On 2020-07-27 11:17, Sven Hartge wrote:
Debian uses their own CA to sign this certificate, which is fine for SMTP, which normally only uses opportunistic encryption. But if the client SMTP-Server is set to *verify* the certificate, it will fail.
Certificate verification is optional on my MTA. See the log file. AFAICT it ignored the failed certificate check and continued with the ssl handshake. *Then* it failed. It would be interesting to know whats written in the log files on buxtehude. Are there other similar incidents? Regards Harri