SMPT password
Tbird 2 machines, both got SMPT fail on send enter new password.
Tried my password used to make email account fail;
win10 1903 os build 18362.295 thunderbird ver 60.8.0 32bit A/V kaspersky internet security ver 19.0.0.1088 (g)
すべての返信 (5)
isp provider suddenlink.net
Connection Security: None
Are you kidding me? You set up 'Connection Security' to 'none'? Why? Set it to 'SSL/TLS'.
Also set 'Authentication method' to 'OAuth2'.
OAuth2 SSL/TLS not supported by suddenlink. Tried several settings. no working. This is the fourth machine on this network, with the problem.
If this problem started Friday then the problem is most likely that Suddenlink has stopped supporting SMTP server on the legacy port 587.
Resolution is to change the values in Thunderbird. Highlight the email account - click on "View Settings for this Account" - Edit SMTP Server. Change the Connection Security to SSL/TSL. Port should now be 465, connection security now SSL/TLS and authentication method now Normal Password. Press okay, press okay and retry.
OAuth2 SSL/TLS not supported by suddenlink.
Apologies, I was looking at the Gmail SMTP, not Suddenlink.
If it still doesn't work with the suggested settings above, then your anti-virus software may be involved. Report back if that's the case.