Viktor Dukhovni via Postfix-users:
> On Mon, Feb 03, 2025 at 05:56:45PM -0500, Wietse Venema via Postfix-users
> wrote:
>
> > There is no built-in featrue to delete IP addresses from headers.
>
> But, given the expected header form, it is not difficult to craft a PCRE
> table that does the job well.
Not difficult for some people. One would need to transform this:
Received: from client-helo (client-name [client-addr])
TLS and SASL login stuff...
by $myhostname ($mail_name) with XXX id YYY;
date-stamp
Remove the client, TLS, and SASL bits, leaving this:
Received: by myhostname ($mail_name) with XXX id YYY;
date-stamp
That is:
master.cf:
submission .. .. .. .. .. .. .. smtpd
-o { header_checks = pcre:{{/^(Received:\s).+\s(by\s.+)/
REPLACE $1$2 }} }
...other -o options...
(ditto for port 465, also known as smtps or submissions.)
I'll add this to the default master.cf file. It will have to be
regexp style, not pcre, to avoid a hard external dependency.
Wietse
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