Emails not sending or receiving on Thunderbird 78.5.0
Thunderbird has been working fine up to today it has now stopped sending and receiving emails as have two other colleagues in my office we are all using gmail and windows 10 with eset anti virus. Emails are all appearing in gmail inbox and if i send an email from thunderbird it gets delivered but does not appear in sent folder in either Gmail or thunderbird. We have not changed any SMTP settings and all three laptops have the same problem from this morning
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I have the same issue with a bunch of other accounts. Thunderbird (75.8.0 on Windows 10 Pro) just stopped downloading mails. It seems like it is trying to connect but to no avail. As Thundberbird suddenly stopped working it seems like a larger problem connected to an update!?
If you are using ESET/NOD32 security/AV then probability is very high it is causing your problems. According to their forums, you should temporarily disable SSL until they solve the problem per https://support.eset.com/en/kb3126-disable-ssl-filtering-in-eset-windows-products?ref=esf - the problem is being reported by dozens of users https://forum.eset.com/topic/26517-problems-with-thunderbird-and-imaps/ https://forum.eset.com/discover/