On 2022-10-28 at 08:40:44 UTC-0400 (Fri, 28 Oct 2022 20:40:44 +0800)
Piperみかこ <pott...@gmail.com>
is rumored to have said:
Hello,
What's the difference between these two options?
smtp_use_tls
smtpd_use_tls
Does the second one mean submission?
No.
smtp_* options are for the SMTP *CLIENT* in Postfix, which sends mail to
other servers. They are used by the "smtp" program.
smtpd_* options are for the SMTP *SERVER* in Postfix, which receives
mail from other mail servers and from users submitting mail. They are
used by the "smtpd" program.
And, for an incoming message, how postfix knows the behavior is made
by a
peer MTA, or by a remote smtp client (like thunderbird)? Because both
MTA
and thunderbird can use port 25 for sending.
To provide different services on multiple ports, you must have multiple
services configured in master.cf to run the smtpd program (such as for
standard SMTP on port 25, TLS-wrapped SMTP on port 465, or submission on
port 587) the configurations are differentiated by "-o" options in
master.cf.
I am a bit confused.
I hope I've helped.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
