post...@ptld.com:
> > On 09-16-2022 3:16 pm, Wietse Venema wrote:
> > If Postfix rejects an SMTP event (connect, ehlo, data, and so on),
> > then Postfix will not send that event to the Milters. If it passed
> > all SMTP events to Milters, then they would get out of sync with
> > Postfix.
>
> Is it possible for a client to include non displaying characters
> in a RCPT TO address and those characters would get passed to the
> milters? Or does postfix filter out "improper" characters before
> sending the RCPT TO address to the milters?
Whatever Postfix allows in an RCPT TO command, that will be sent
to a Milter. The domain portion of an email address must contain
valid domain name syntax, but there are few restrictions on what
it allows in an address localpart (no carriage return or linefeed).
Wietse
