cannot send emails, ESMTP not available
Just yesterday, started receiving this error on outgoing mails using Thunderbird using multiple Comcast email accounts:
An error occurred while sending mail: The mail server sent an incorrect greeting: resomta-ch2-09v.sys.comcast.net resomta-ch2-09v.sys.comcast.net Excessive failed authentication, ESMTP server temporarily not available.
Found multiple similar posts, but no clear fix. Thunderbird thinks they are sent. I can look in my account on a different device and they are in the sent folder, so got as far as the imap server. Can then resend from my iPad without any error. No problem with receiving