Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I keep getting the error message "Relay Access Denied" when I try to send an email in Thunderbird.

  • 1 reply
  • 1 has this problem
  • 5 views
  • Last reply by llatronica

more options

I can receive email. My account settings/server info is correctly set up. When I try to send email, I get "An error occurred while sending mail. The mail server responded: 5.7.1: Relay Access Denied. Please check the message recipient and try again. I get this for all recipients. How do I fix this? I am running Thunderbird 52.9.1 on my Macbook Air with OS X 10.11.6. I tried to download the most recent version of Thunderbird 3 times but it errors out saying it is damaged and cannot be opened.

I can receive email. My account settings/server info is correctly set up. When I try to send email, I get "An error occurred while sending mail. The mail server responded: 5.7.1: Relay Access Denied. Please check the message recipient and try again. I get this for all recipients. How do I fix this? I am running Thunderbird 52.9.1 on my Macbook Air with OS X 10.11.6. I tried to download the most recent version of Thunderbird 3 times but it errors out saying it is damaged and cannot be opened.

All Replies (1)

more options

The network is the same as the mail provider.