In today’s digital age, email communication is a crucial aspect of any business or organization. With the increasing reliance on email as a primary means of communication, it is essential to have a reliable and efficient mail server. One such server that provides excellent features and capabilities is Office 365.
Office 365 is a cloud-based platform that offers a wide range of services, including email and collaboration tools. One of the key features of Office 365 is its ability to serve as a mail relay server. A mail relay server acts as an intermediary between the sender and recipient, facilitating the delivery of emails.
Setting up and using the Office 365 relay server is relatively straightforward. The first step is to configure the authentication settings. Office 365 uses the Simple Mail Transfer Protocol (SMTP) for email delivery, and it requires proper authentication to ensure secure and reliable communication. By enabling authentication, you can prevent unauthorized access and protect your sensitive data.
Once the authentication settings are in place, you can start using the Office 365 relay server. It allows you to send email messages to both internal and external recipients seamlessly. Whether you need to send an important update to your colleagues or deliver a message to a client, the Office 365 relay server ensures reliable and timely delivery.
What is Office 365 Relay?
Office 365 Relay is a feature that allows users to send email through an Office 365 account using the Simple Mail Transfer Protocol (SMTP). It provides a way to authenticate and relay mail from various applications and devices, allowing users to easily send emails from within their organization.
Authentication
Office 365 Relay uses authentication to ensure that only authorized users and devices can send emails. This helps to prevent unauthorized access and misuse of the service. Users can authenticate using their Office 365 account credentials, and devices can authenticate using a unique authentication key generated by Office 365.
How it works
When an email is sent using Office 365 Relay, it is first authenticated to ensure the sender is authorized. Once authentication is successful, the email is then relayed to the recipient through the Office 365 Exchange server. This ensures that the email is delivered securely and reliably.
Office 365 Relay provides a convenient way for organizations to centralize their email services and allows for easy integration with various applications and devices. Whether it’s sending emails from a printer, a website contact form, or an application, Office 365 Relay simplifies the process and ensures that emails are sent securely.
Why use Office 365 Relay?
Office 365 Relay is a useful tool for managing email delivery in an Office 365 environment. It allows you to send email from applications, devices, or services that don’t have their own SMTP (Simple Mail Transfer Protocol) server.
With Office 365 Relay, you can bypass the need for an on-premises Exchange server and utilize the robust email infrastructure provided by Office 365. This means you can send email securely and efficiently, without the need to maintain your own email server.
Benefits of using Office 365 Relay:
- Simplicity: Office 365 Relay simplifies the process of sending email from applications or devices by providing a single SMTP endpoint to send all your email.
- Security: By using Office 365 Relay, you can take advantage of the security features provided by Office 365, such as encryption and spam filtering, to ensure the integrity and confidentiality of your email.
- Reliability: Office 365 provides a highly available and reliable email infrastructure, so you don’t have to worry about managing your own email server and maintaining uptime.
- Scalability: With Office 365 Relay, you can easily scale your email delivery as your needs grow, without having to invest in additional hardware or infrastructure.
- Cost savings: By utilizing Office 365 Relay, you can save on the cost of maintaining and managing your own email server, as well as the cost of additional hardware and software licenses.
Overall, Office 365 Relay is a valuable tool for organizations that want to streamline their email delivery process and take advantage of the features and benefits offered by Office 365. By using Office 365 Relay, you can ensure secure and efficient email communication without the hassle of managing your own email server.
Setting up Office 365 Relay
Setting up an Office 365 relay allows you to send and receive mail through your Office 365 account using an external mail server. This can be useful if you have an existing mail server or if you want to use Office 365 as a relay for email authentication purposes.
The first step in setting up an Office 365 relay is to configure your external mail server. You’ll need to provide the server with your Office 365 SMTP server settings, including the server address and the port number. This information can be found in your Office 365 account settings.
Next, you’ll need to configure authentication for your relay. Office 365 requires that the external mail server provides valid authentication credentials before accepting any emails. This ensures that only authorized users can send and receive email through your Office 365 account.
Once your external mail server is configured and authenticated, you can start using Office 365 as a relay for your email. Any emails sent or received through your external mail server will be processed through your Office 365 account, allowing you to take advantage of Office 365’s advanced email features.
Setting up an Office 365 relay is a straightforward process that can greatly enhance your email capabilities. Whether you have an existing mail server or you want to use Office 365 for email authentication, a relay can help streamline your email communication and ensure that your messages are delivered securely.
Create a connector in Exchange Online
To relay email from your server through Office 365, you will need to create a connector in Exchange Online. A connector is a configuration that allows your server to communicate with Office 365 using the Simple Mail Transfer Protocol (SMTP).
Step 1: Sign in to Exchange Online
First, sign in to the Exchange Online admin center using your Office 365 account.
Step 2: Navigate to the connectors page
In the admin center, go to the “Mail flow” section and select “Connectors”.
Step 3: Create a new connector
| Action | Value |
|---|---|
| From | Select “Your organization’s email server”. |
| To | Select “Office 365”. |
| Connection security | Select “Opportunistic TLS”. |
| Authenticate | Select “No”. |
Click “Next” to continue.
Step 4: Configure the connector
On the next page, configure the following settings:
| Setting | Value |
|---|---|
| Specify the name of this connector: | Enter a name for the connector. |
| Use the MX record associated with the recipient domain: | Leave this option unchecked. |
| Route email through these smart hosts: | Enter the smart host server address. |
| TLS certificate validation: | Choose “Domain validation”. |
Click “Next” to continue.
Step 5: Confirm the connector
Review the connector settings, and click “Next” to create the connector.
Once the connector is created, you can test the relay by sending an email from your server and checking if it is successfully relayed through Office 365. This connector will allow your server to securely and reliably send emails using Office 365 as a relay.
Configure your mail flow rule
After setting up Office 365 relay, it is crucial to configure your mail flow rule to ensure proper email delivery. The mail flow rule will specify how Office 365 handles mail sent to your organization.
To configure your mail flow rule, follow these steps:
- Access the Exchange Admin Center.
- Navigate to the Mail Flow section.
- Click on the “Rules” tab.
- Select “New” to create a new rule.
- Specify a name for the rule.
- Choose the conditions for the rule, such as recipient or sender attributes.
- Define the actions to take for the rule, such as redirecting, rejecting, or modifying the message.
- Ensure that the rule is triggered for messages sent to the relay server.
- Enable the rule and save your changes.
By configuring your mail flow rule, you can enhance the security and efficiency of your email system. This allows you to have more control over how email is handled and ensures proper authentication and delivery of messages through the relay server.
Testing your Office 365 Relay
To ensure that your Office 365 relay is set up correctly, it is important to perform thorough testing. This will help you verify that the exchange of mail through SMTP in Office 365 is functioning properly.
One of the first steps in testing your Office 365 relay is to check the authentication settings. Make sure that the server is configured to require authentication for sending emails. This will help prevent unauthorized access to your relay.
Next, you can test the relay by sending an email from an external email account to an internal account within Office 365. This will help you confirm that emails are being successfully delivered through the relay.
You can also test the relay by sending an email from an internal account to an external email address. This will help you ensure that outgoing emails are being routed through the relay properly.
During testing, it is important to monitor the logs and message tracking in Office 365 to identify any potential issues. This will allow you to troubleshoot and resolve any problems that may arise.
In addition to testing the relay itself, it is recommended to test the Office 365 configuration as a whole. This includes checking other features and settings, such as mailbox permissions, email routing, and spam filtering.
By thoroughly testing your Office 365 relay, you can ensure that the exchange of mail through SMTP in Office 365 is working effectively and securely. This will help your organization maintain smooth and reliable email communication.
Using Office 365 Relay
The Office 365 relay is a feature that allows you to send emails through your Office 365 account using the Simple Mail Transfer Protocol (SMTP). This can be useful for organizations that use other email systems, such as Exchange, but want to take advantage of Office 365’s email infrastructure.
In order to use the Office 365 relay, you’ll need to configure your email applications or devices to authenticate with your Office 365 account. This ensures that only authorized senders are able to use the relay and helps protect against misuse.
Setting up the Office 365 relay involves a few steps. First, you’ll need to create a new mail flow connector in the Exchange admin center. This connector acts as a bridge between your email applications or devices and the Office 365 relay service.
Next, you’ll configure the settings for the mail flow connector. This includes specifying the allowed sender IP addresses or ranges, setting the maximum message size, and choosing whether to require authentication for incoming messages.
After configuring the mail flow connector, you’ll need to update your email applications or devices to use the Office 365 relay for outgoing mail. This typically involves specifying the Office 365 SMTP server address, your Office 365 username and password, and any other required authentication details.
Once everything is set up, you can start using the Office 365 relay to send your outgoing mail. This can be particularly useful if you have multiple email systems within your organization and want to streamline your email infrastructure by centralizing outgoing mail through Office 365.
Overall, the Office 365 relay provides a convenient way to leverage Office 365’s email capabilities while still using other email systems. By following the necessary steps to set up and configure the relay, you can ensure secure and efficient email communication for your organization.
| Key Benefits of Using Office 365 Relay: |
|---|
| 1. Centralized outgoing mail management |
| 2. Utilize Office 365’s email infrastructure |
| 3. Ensure secure and authenticated email communication |
| 4. Streamline email processes for organizations with multiple email systems |
Sending emails through Office 365 Relay
If you want to send emails using Office 365 Relay, there are a few steps you need to follow. First, you’ll need to configure your mail server to authenticate with Office 365. This authentication ensures that your server is authorized to send emails through Office 365.
Once the authentication is set up, you can start using the SMTP (Simple Mail Transfer Protocol) relay feature. This feature allows your mail server to send emails through Office 365’s servers. By leveraging Office 365’s powerful infrastructure, your emails are more likely to be delivered successfully.
To use the SMTP relay, your mail server needs to be configured with the correct settings. These settings include the server address for Office 365, along with any necessary login credentials. By inputting this information into your mail server’s configuration, you can ensure that your emails are properly routed through Office 365’s servers.
Using the Office 365 Relay for email delivery offers numerous benefits. For one, it allows you to take advantage of Office 365’s robust infrastructure, ensuring that your emails are sent efficiently and reliably. Additionally, using the relay feature helps prevent your emails from being marked as spam, as they are sent through trusted servers.
So, if you’re looking to send emails through Office 365, setting up and using the relay feature is a smart choice. Not only does it provide authentication and enhanced deliverability, but it also streamlines the process of sending emails from your mail server.
Monitoring your email delivery
When using Office 365 relay to send mail, it is important to monitor your email delivery to ensure that messages are being sent successfully and are reaching their intended recipients. This can help you identify any potential issues and take appropriate action.
Authentication
One aspect to consider when monitoring your email delivery is authentication. Office 365 relay uses SMTP authentication to verify that the sender is authorized to send mail through the Exchange server. By monitoring the authentication logs, you can ensure that only legitimate senders are able to send mail through your relay.
Office 365 logs
Office 365 keeps logs of all mail transactions, including messages sent through the relay. These logs can provide valuable information about the delivery status of your sent emails. You can access these logs through the Office 365 admin center or by using PowerShell commands.
| Log | Description |
|---|---|
| Message tracking logs | These logs provide detailed information about each message that passes through the Exchange server. You can use them to track the delivery status of specific emails. |
| SMTP relay logs | These logs record all inbound and outbound SMTP traffic for your relay. They can help you troubleshoot any issues with mail delivery. |
| Mail flow analytics | This feature provides an overview of your organization’s mail flow, including the number of messages sent and received, the delivery status, and any delivery delays. |
By regularly reviewing these logs and analytics, you can ensure that your emails are being delivered successfully and take prompt action if any issues arise. This proactive approach can help maintain a reliable mail delivery system for your organization.
Benefits of Office 365 Relay
Authentication: One of the major benefits of Office 365 Relay is its authentication capability. It ensures that only authorized users can send emails through the relay server. This helps in preventing unauthorized access and protects the server from potential security threats.
Relay Server: Office 365 Relay acts as an intermediary between the sender and recipient email servers. It accepts outgoing emails from the client’s device or application and forwards them to the appropriate recipient. This ensures that emails are delivered efficiently and reliably, without the need for a direct connection to the recipient’s server.
Exchange Integration: Office 365 Relay seamlessly integrates with Exchange Online, providing a secure and efficient way to send emails. It supports all the standard features of Exchange, including automatic email routing, mailbox rules, and message tracking. This allows organizations to leverage their existing Exchange infrastructure and workflows.
Mail Flow Control: With Office 365 Relay, organizations have more control over their mail flow. They can configure policies and rules to manage how emails are sent and received. This includes setting up filters to block spam or unwanted emails, enforcing encryption for sensitive information, and defining restrictions on attachment sizes.
SMTP Support: Office 365 Relay supports the widely used SMTP (Simple Mail Transfer Protocol) for email delivery. This makes it compatible with a wide range of devices, applications, and programming languages that rely on SMTP to send emails. It allows organizations to leverage their existing infrastructure and easily integrate Office 365 Relay into their existing workflows.
Email Delivery: By using Office 365 Relay, organizations can ensure reliable and efficient email delivery. The relay server optimizes the routing and delivery of emails, ensuring that they are promptly delivered to the intended recipients. This helps in improving communication within the organization and with external contacts.
Office 365 Integration: Office 365 Relay seamlessly integrates with other Office 365 services, such as Exchange Online, SharePoint Online, and Microsoft Teams. This allows organizations to leverage the full suite of Office 365 tools and services, making it easier to collaborate and communicate effectively.
Overall, Office 365 Relay provides a secure, efficient, and flexible solution for sending emails. It offers authentication, seamless integration with Exchange, control over mail flow, compatibility with SMTP, reliable email delivery, and integration with other Office 365 services. Organizations can benefit from using Office 365 Relay to streamline their email communication and enhance productivity.
Common issues with Office 365 Relay
Configuring the Office 365 Relay for sending mail can sometimes face a few common issues. Here are some of the issues you may encounter and their possible solutions:
Authentication issues
One common issue is incorrect authentication settings. Make sure that you have entered the correct credentials for the Office 365 account and check if the account has the necessary permissions to relay email. Additionally, ensure that any two-factor authentication is properly configured.
Office 365 server configuration
Another issue could be related to the Office 365 server configuration. Ensure that the server settings, including the SMTP server address and port numbers, are correct. Double-check that you have selected the appropriate protocol (such as SMTP or Exchange) for the relay.
If you are using Exchange Online, verify that the connector settings are properly configured. Pay attention to the allowed IP addresses for relaying and any restrictions that may be in place.
Email delivery problems
In some cases, you may experience email delivery problems. This can be due to various reasons, such as blocked or filtered emails by the recipient email server. Ensure that the recipient’s server is not blocking or filtering the relayed emails.
Additionally, check if any spam filters or firewall settings are blocking the relayed emails. Make sure that the SMTP server used for the relay is not listed on any blacklists.
If you continue to face issues with email delivery, you may need to contact Office 365 support for further assistance.
Blocked IP addresses
In Office 365 Relay, it is important to note that certain IP addresses may be blocked by the server due to authentication or security reasons. This can affect the ability to send email through the SMTP (Simple Mail Transfer Protocol) server.
Blocked IP addresses can occur for several reasons, including suspicious activity, failed authentication attempts, or known sources of spam or phishing attempts. When an IP address is blocked, it is unable to connect to the Office 365 Relay server to send mail.
How to check if your IP address is blocked
If you suspect that your IP address is blocked, you can check its status by following these steps:
- Access your Office 365 account and go to the Admin center.
- Navigate to the Exchange Admin center.
- Click on “Protection” in the left-hand menu.
- Select “Connection filter” from the list of options.
- Review the list of blocked IP addresses under the “IP Allow list” section.
If your IP address is listed as blocked, you will need to take action to have it unblocked. This may involve contacting your IT department or network administrator to investigate the reason for the block and request removal.
Preventing IP address blocks
To avoid having your IP address blocked in the future, it is important to ensure that your email practices align with best practices for security and spam prevention. Here are some tips:
- Authenticate your email: Make sure that your emails are properly authenticated with SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) to help prevent them from being flagged as suspicious.
- Regularly check for issues: Monitor your email logs and review any bounce-back or rejection messages to identify and resolve any problems promptly.
- Follow email sending guidelines: Familiarize yourself with the email sending guidelines provided by Office 365 and ensure that your emails comply with them.
- Avoid suspicious activities: Do not engage in activities that may trigger security measures, such as sending a large volume of emails in a short period or including suspicious content.
By following these best practices, you can minimize the risk of your IP address being blocked by the Office 365 Relay server and maintain smooth email communication.
Authentication Problems
In order to set up and use Office 365 relay for sending email, proper authentication must be configured. If authentication problems are encountered, it can prevent the relay from functioning correctly.
Common authentication issues
Here are some common authentication problems that can occur when setting up Office 365 relay:
- Exchange Online Protection (EOP) filtering: EOP can sometimes block the relay if the sending IP address is not whitelisted. Ensure that the sending IP address is added to the allowed list in EOP.
- Incorrect SMTP settings: Make sure that the correct SMTP settings are configured, including the server address, port number, and authentication credentials.
- Invalid or expired credentials: Double-check that the login credentials used for authentication are valid and have not expired. Update the credentials if necessary.
- Two-factor authentication: If two-factor authentication is enabled for the account, special configuration may be required to authenticate the relay. Consult the Office 365 documentation for guidance.
Troubleshooting authentication problems
If authentication problems persist, here are some troubleshooting steps to try:
- Test authentication credentials: Verify the authentication credentials by using them to manually log in to the mail server.
- Check SMTP logs: Examine the SMTP logs for any error messages related to authentication. This can provide insight into the specific issue.
- Contact support: If all else fails, reach out to Office 365 support for further assistance. They can help troubleshoot and resolve any authentication problems.
By addressing authentication problems, the Office 365 relay can be properly configured and used for sending mail without any issues.
High bounce rates
When using Office 365 as your email server, it is important to keep an eye on the bounce rates of your emails. Bounce rates refer to the percentage of emails that are returned to the sender due to being undeliverable.
There are several factors that can contribute to high bounce rates in Office 365. One common issue is incorrect SMTP server settings. It is crucial to double-check that you have entered the correct server name, port number, and authentication method. If any of these settings are incorrect, your emails may not be delivered, resulting in a high bounce rate.
Another possible cause of high bounce rates is authentication issues. Office 365 requires proper authentication to send emails. Ensure that you have set up the necessary authentication methods, such as SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail), to verify the authenticity of your emails. Without proper authentication, your emails may be flagged as spam and bounce back.
Additionally, the content of your emails can also affect bounce rates. If your emails contain spam triggers or suspicious links, recipients’ email servers may mark them as spam and reject them. It is essential to craft your emails with relevant and valuable content to avoid triggering spam filters.
Monitoring your bounce rates regularly can help you identify and address any issues that may be causing undeliverable emails. By taking proactive measures to fix any problems, you can improve email deliverability and reduce bounce rates for a seamless email communication experience with Office 365.
| 365 | exchange | smtp | authentication | office | server |
Alternatives to Office 365 Relay
While Office 365 Relay is a popular choice for email communication in an office setting, there are alternative options available for those who may not have access to or prefer not to use this service. Here are a few alternatives to consider:
SMTP Servers
A common alternative to Office 365 Relay is setting up your own SMTP server. SMTP (Simple Mail Transfer Protocol) servers allow you to send and receive email messages, just like Office 365 Relay. By setting up an SMTP server, you can have more control over your email flow and customize the settings to fit your specific needs.
Exchange Server
If you have access to Microsoft Exchange Server, it can serve as an alternative to Office 365 Relay. Exchange Server is a reliable email server platform that supports both internal and external email communication. It provides advanced features such as calendaring, contacts management, and collaboration tools.
| Alternative | Features |
|---|---|
| SMTP Servers | – Customizable settings |
| – More control over email flow | |
| – Can be implemented on-premises or in the cloud | |
| Exchange Server | – Advanced features (calendaring, contacts management, collaboration tools) |
| – Seamless integration with Microsoft Office | |
| – High level of security and data protection |
When considering alternatives to Office 365 Relay, it’s important to evaluate your specific needs and requirements. Each alternative has its own advantages and may be more suitable for certain scenarios. By exploring these alternatives, you can find the best solution for your email communication needs.
SMTP relay services
SMTP (Simple Mail Transfer Protocol) relay services are essential for any organization using Office 365. These services act as a mail server that accepts outgoing mail from authorized senders and forwards it to the intended recipients. SMTP relay services provide a secure and efficient way to send emails from your Office 365 environment.
With SMTP relay services, you can authenticate your email server to send messages on your behalf, ensuring that your emails are trusted and not flagged as spam by the recipient’s email servers. This authentication process verifies that you are a legitimate sender and prevents unauthorized use of your email server.
Office 365 offers its own SMTP relay service, which allows you to send outgoing emails using your Office 365 account. This service is useful for organizations that require a reliable and secure way to send bulk emails or notifications to their customers or employees.
To set up SMTP relay in Office 365, you need to configure your email server to send mail through the Office 365 server. This involves providing the necessary authentication details and specifying the Office 365 SMTP server address. Once the configuration is complete, your email server will be able to relay emails through Office 365, ensuring deliverability and security.
Using SMTP relay services can benefit your organization in multiple ways. It allows you to centralize your email sending operations and provides a scalable solution for sending large volumes of emails. Moreover, it ensures that your emails are delivered reliably and securely, reducing the risk of them ending up in the recipient’s spam folder.
Overall, SMTP relay services are an integral part of any organization’s email infrastructure. They enable reliable and secure email delivery, ensuring that your messages reach their intended recipients without being blocked or flagged as suspicious. By utilizing Office 365’s SMTP relay service, you can take advantage of a trusted and efficient solution for sending emails from your Office 365 environment.
Third-party email gateways
In addition to using the standard Office 365 mail system, you can also configure third-party email gateways to handle your organization’s email traffic. These gateways act as intermediaries between your Office 365 environment and the external email servers.
To set up a third-party email gateway, you will need to configure the necessary settings in both the gateway and your Office 365 account. This typically involves setting up the gateway to authenticate with Office 365 using SMTP authentication and configuring the necessary routing rules.
Authentication
When configuring a third-party email gateway, it is important to ensure that the gateway is properly authenticated with your Office 365 account. This authentication typically involves providing the gateway with the necessary credentials, such as a username and password, to authenticate with the Office 365 SMTP server.
Exchange server
Your third-party email gateway will need to be configured to route email traffic to the appropriate Exchange server in your Office 365 environment. This typically involves providing the gateway with the necessary information, such as the server’s address and port number, to establish a connection with the Exchange server.
Once the gateway is properly configured, it will be able to handle incoming and outgoing email traffic for your organization, providing an additional layer of protection and control over your email environment.
| Benefits | Considerations |
|---|---|
| Enhanced security and control over email traffic | Additional configuration and maintenance may be required |
| Ability to integrate with existing email infrastructure | Potential for increased complexity in email routing |
| Option to use advanced filtering and content scanning | Dependency on the availability and reliability of the gateway |
Question-answer:
What is Office 365 relay?
Office 365 relay is a feature that allows you to send email messages through your Office 365 account using an email client or application that does not support Office 365 natively.
How do I set up Office 365 relay?
To set up Office 365 relay, you will need to configure a connector in your Office 365 Exchange Online Admin Center. This connector will specify the allowed senders, the source IP addresses, and other necessary settings for relaying email through your Office 365 account.
Can I use Office 365 relay with any email client?
Yes, you can use Office 365 relay with any email client or application that supports SMTP authentication. This includes popular email clients like Microsoft Outlook, Mozilla Thunderbird, and Apple Mail, as well as custom-built applications.
What are the benefits of using Office 365 relay?
Using Office 365 relay allows you to leverage the reliability and security of Office 365 for sending email messages. It also allows you to centralize your email sending through a single platform, making it easier to manage and monitor your email communications.
Are there any limitations or restrictions with Office 365 relay?
While Office 365 relay offers a convenient way to send email messages, there are some limitations and restrictions. For example, you may have a limit on the number of messages you can send per day, as well as restrictions on the size of attachments. It’s important to review the documentation and terms of service for Office 365 relay to understand these limitations.
What is Office 365 relay?
Office 365 relay is a feature that allows you to send email messages directly from your application or device, bypassing the need for an Office 365 mailbox.
How do I set up Office 365 relay?
To set up Office 365 relay, you need to create a connector in the Exchange admin center. You will need to provide the necessary information such as the sender’s IP address or FQDN and configure the security settings. Once the connector is set up, your application or device can start sending email using Office 365 relay.
What are some use cases for Office 365 relay?
Office 365 relay can be used in various scenarios, such as sending automated notifications or alerts from your application, sending printer or scanner emails, or integrating with third-party systems that require email functionality.
Is Office 365 relay secure?
Yes, Office 365 relay supports secure email transmission using opportunistic TLS. This means that if the receiving mail server supports TLS encryption, the email will be encrypted during transmission. You can also configure additional security settings, such as IP restrictions or requiring authentication, to further secure your relayed messages.
Are there any limitations or restrictions with Office 365 relay?
Yes, there are some limitations and restrictions with Office 365 relay. For example, there are limits on the number of recipients and the number of messages that can be sent per day. There are also restrictions on the types of messages that can be relayed, such as bulk email or spam. It’s important to review and understand these limitations before setting up Office 365 relay.