Hi All, when attempting to enforce TLS with a remote server i saw it failing. The reason turned out to be with the remote server-banner consisting of '*'-characters only. The local postfix-smtp in this case insisted to send "HELO". I'ld like to understand if i can override/force postfix-smtp to send "EHLO" in all cases instead (... postfix configured with "smtp_always_send_ehlo = yes" ...) or in which RFC i could find more information about the expectation on the server-banner.
Brief tests with local postfix client <= 3.1.0: remote banner= "220 *" - HELO sent remote banner= "220 a" - EHLO sent remote banner= "220 0" - HELO sent (--> remote banner must start with alpha?) Thanks for any hint, Regards, Thomas
