Learn how to resolve Sendmail Relaying Denied from our experts. Our Sendmail Support team is here to help you with your questions and concerns.

Sendmail Relaying Denied error| Resolved

Relaying is a process where a mail server is expected to pass sent emails on to it the recipient who is on a different mail server. If we come across a “Relaying Denied” error, it indicates that an unauthorized user has tried to send a non-local email.

Interestingly, this is a commonly seen server error. Let’s take a look at some of the commonly seen relaying errors:

• 550 Relaying denied
• 550 Relaying not allowed
• 550 Relay not permitted
• 550 5.7.1 Unable to Relay
• 553 SMTP Relaying Denied
• 553 sorry, that domain isn’t in my list of allowed rcpthosts (#5.7.1)
• 550 5.7.1 <help@bobcares.com>… Relaying denied
• 554 <help@bobcares.com>: Relay access denied

Furthermore, it is important to note that mail servers do not relay mail from just anyone. If they did, spammers would have a field day, flooding the mail server, to do their dirty work. Hence, we have to be authorized to use a mail server for relaying.

In other words, unauthorized users will wind up with the “Relaying Denied” error. Our experts would like to point out that there are 2 servers to consider – Sender’s MX and Recipient’s MX. Hence, if either of these servers rejects the mail, it will result in an error.

Troubleshooting Tips

Here are a few troubleshooting tips to resolve the Relaying denied error:

• Verify SMTP Server Settings
• Authenticate with the Mail Server
• Enable SMTP Authentication
• Use the Correct SMTP Port
• Check Firewall and Network Restrictions
• Verify Sender’s IP Address
• Contact the Mail Server Administrator

Let us know in the comments if you need further help with the Relaying Denied in Sendmail.

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Conclusion

To conclude, our Support Techs gave us a quick look at the Sendmail Relaying Denied error and how to resolve it.