IMAP timing out in Apple Mail in Big Sur

Yesterday I upgraded from Catalina to Big Sur on my 2018 Mac mini.


Prior to upgrading to Big Sur, sending and receiving mail on Apple Mail worked flawlessly. However, after the upgrade IMAP mail times out when trying to log into GoDaddy's IMAP server.


I have spoken with GoDaddy and they assure that absolutely NOTHING has changed at their end.


I am using Port 587 and "Use TLS/SSL" is checked.


What has changed in Big Sur?

Posted on Nov 14, 2020 6:08 PM

Reply
Question marked as Top-ranking reply

Posted on Nov 25, 2020 2:19 AM

Hi,

I have been experiencing the same issue on my 2019 iMac.

O/S: Big Sur (11.0.1)

Anti-virus: Avast Security 14.6

Network monitor: Radio Silence 3.0 (Beta)


I have done some research and found the following page (Avast forums) which provides detailed explanations:

https://forum.avast.com/index.php?topic=239798.0

Running the command in Terminal (as instructed) did return both Radio Silence and Avast Antivirus as a source of issues.


Avast has reported the issue to Apple and I do hope they will address it in the upcoming 11.1 release. Avast is also working on some fix in the upcoming 14.7 release.


Meanwhile I have followed Avast's recommendation and disabled their Web Shield for now. Mail is back to normal while Radio Silence (currently in a beta release that is compatible with Big Sur) is running fine.


(@sketchywizard : You may want to restart your computer to test whether Avast + Little Snitch operate normally once Web Shield is disabled, that is exactly what I did and it did fix the issue. Maybe worth a try.)


Hope this helps.

62 replies

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

IMAP timing out in Apple Mail in Big Sur

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.