Thunderbird stopped downloading email - Solution
The problem and solution: (For anyone who needs this info). Two days ago TB did and update. After the update TB stopped downloading email from all accounts IMAP & POP on multiple email servers (Gmail, Cox, Mailfence, Proton and so on) but I could still send emails. You could see the bottom bar say connecting but nothing would happen. No error message or anything, just no download. I tried all the suggestions listed in the TB 78 FAQ page and only one worked.
I use ESET. It also did an update around the same time TB did it turned out. The last suggestion I found to fix this was to turn off SSL/TLS in ESET then restart it. I turned off the SSL/TLS saved it then turned it back on. As soon as I did that it fixed the problem. So the problem was ESET. The root certificate was not properly imported during the installation of the update.
I hope this might help others.
https://support.eset.com/en/kb3126-disable-ssl-filtering-in-eset-windows-products
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If you mark this topic a solved it appears in google searches. If you do not it is very hard to find.
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Chosen Solution
If you mark this topic a solved it appears in google searches. If you do not it is very hard to find.
Matt said
If you mark this topic a solved it appears in google searches. If you do not it is very hard to find.
Thanks Matt, well appreciate the comment. Done
Modified
I'm having the same problem. This is a huge security problem!
I turned out to be my hosting service migrated my email server and did not tell me. Hostmonster.com if anyone else is using them. There was a server migration recently and nobody told me!
They are using host2139 now.
More/Related Info: • Disable AV/FW/SS software mail-protection OR enable+add+allow EXCEPTIONS in it & add mail-server names/address . Some AV/SS creates insecure proxy/gateway for scanning/checking emails, but there are other secure way to scan/check emails . Please make sure the option "Allow AV to Quarantine email" is selected inside TB, and make sure your AV/SS is set to "Scan all files on access". • Regain old data in Windows : by using downgrade process, or by using a Second-TB, or by using manual file-transfer,etc).