Hi! I also just fell victim to this problem, setting MAIN_TLS_TRY_VERIFY_HOSTS to the empty string instead of a wildcard helped to work it.
Fortunately someone called me by phone to tell me he wasn't able to send me an eMail, otherwise I'd not had known I actually had a mail delivery problem... How about actually changing MAIN_TLS_TRY_VERIFY_HOSTS' default value? And maybe the related (?) bugs 515999, 517394 and 482420 should be merged? Gunter
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