> On Apr 8, 2023, at 11:59, Viktor Dukhovni via Postfix-users > <postfix-users@postfix.org> wrote: > > On Sat, Apr 08, 2023 at 11:51:06AM -0700, Doug Hardie via Postfix-users wrote: > >> A couple of questions. Looking in the postfix generated Received: >> header, the SMTP id often has a few other letters included: ESMTPA >> etc. I am guessing that the extra letters mean: >> >> E - EHLO used rather the HELO >> S - SSL was used in the connection >> A - the originator was authenticated >> >> Are there any others and how close am I? > > > https://www.iana.org/assignments/mail-parameters/mail-parameters.xhtml#mail-parameters-7
Wow, I never would have guessed there would be that many. Thanks. > >> When the alias file pipes an email to a program, does it expect any >> response from that program, > > Only a 0 exit status code, in which case the program should not generate > any output. > >> or would it do anything with a response? > > If an error occurs some of the output might be included in the bounce. Now that sounds like a useful feature. I'll have to try it out. -- Doug _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
