Currently I use the following for my posfix mail servers: Code: ... smtpd_tls_ask_ccert = yes smtpd_tls_security_level = may ... smtp_tls_security_level = may ... If I would enforce encryption with smtpd_tls_security_level = encrypt and smtp_tls_security_level = encrypt, I assume that there's a chance that some may not be able to receive my mails and I may not be able to receive theirs mails?
