On Thu, Jan 12, 2023 at 04:23:17PM -0500, post...@ptld.com wrote: > >> /etc/postfix/header_checks_smtp: > >> /^Received:/ IGNORE > >> /^X-Originating-Ip:/ IGNORE > > > > That's a rather radical "solution". More typically one would just drop > > "Received" headers known to be added by the local MTA (matching the > > hostnname in "by" clause explicitly). > > I assumed smtp_header_checks is not used by smtpd "incoming from the > world".
It isn't if you don't relay the mail anyway. If you do relay it, then all the "Received" headers are stripped. > Is it possible to include the smtp_header_check in the submission > settings in master.cf to make sure it is only applied to > "outgoing to the world" email? Yes, if submission and incoming mail are in separate Postfix instances. > > As for "X-Originating-Ip:", if you're the one not adding it, why > > remove it? And if you are adding it, then why, if only to remove > > it? > > Because the webmail software im using adds it, so I use postfix to > strip it back out. I see, you have a server-side Web-based MUA... Understood. -- Viktor.