On Wed, Jan 24, 2024 at 08:27:53PM +0100, Matthias Schneider via Postfix-users
wrote:
> Using a Milter is an option, but it often involves correlating
> information from both the milter process and the log for a
> comprehensive view.
Everything of interest can be added as a message header.
> For example, capturing TLS details from both the smtp client process
> and smtpd pid, along with recipient information and specific Headers
> is crucial.
You can PREPEND the TLS details for inspection by a milter. Why is this
"crucial"? Postfix SMTP server TLS logging is fairly terse. Other than
that TLS was used, what is so crucial to correlate with message headers?
> As far as I know, there are currently no other supported protocols for
> event streaming. Therefore, relying on syslog (nearly real-time) or
> reading logs from a file (with some delay) remains the most effective
> solution for obtaining delivery information.
A milter can stream its findings to some central collection point using
any protocol of its choice, including syslog.
--
Viktor.
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