Hi, I have an smtpd listener that functions as an MX (listening on tcp/25, accepting email for local domains), and a separate smtpd listener that functions as submission server (listening on tcp/587, using mandatory TLS and authenticated smtp, allowing relay services). Now I would like to use header_checks to remove some privacy-information (like the User-Agent header and some information in the first Received header) for all mail that enters through submission. I don't want these checks applied for mail that enters through the regular tcp/25 smtpd. Is this possible?
I noticed that the header_checks configuration options only applies to cleanup, not to smtpd. I didn´t see a way to have separate cleanup processes/configurations for the different smtpd's, nor a way to let cleanup behave differently depending on the smtpd that received the email. Or is this an example where a multi-instance configuration would be the preferred solution? Kind regards, Erik.
