trying to set up new Gmail account in Thunderbird gives 'Unable to log in at server' error.
A few days ago Thunderbird stopped updating the content of the Inbox for my Gmail account. The account was still able to send messages, but gave an error saving a copy to the Sent folder. I tried a few things to remedy the problem without success. Then I tried removing the account from Thunderbird and setting it up anew. To set it up, I used File...New... Existing Mail Account... I filled in the 'Set Up Your Existing Email Address' page with my name, email address and password and clicked Continue. The page refreshed with a 'Configuration found in Mozilla ISP database'. When I clicked Done, I got an error 'Unable to log in at server. Probably wrong configuration, username or password.' I verified my password by logging into Google through a browser interface. My online searches for a solution have not turned up anything that seems to fit my situation. I would appreciate guidance for resolving this.
Solution choisie
If you are using ESET/NOD32 security/AV then probability is very high it is causing your problems. According to ESET forums, you should temporarily disable SSL on ESET 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/
You might also inform them of your difficulty.
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Solution choisie
If you are using ESET/NOD32 security/AV then probability is very high it is causing your problems. According to ESET forums, you should temporarily disable SSL on ESET 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/
You might also inform them of your difficulty.
The problem was indeed ESET and the solution you directed me to did the trick. Thank you!
Would you be so kind to select the comment by Wayne Mery as a 'Chosen solution' as this makes it easier for others to locate the info. Cheers.