On Wed, Mar 21, 2018 at 07:06:33PM +0000, Aaron Bennett wrote: > I'm confused by the docs at > http://www.postfix.org/postconf.5.html#always_add_missing_headers, > to wit: > "Always add (Resent-) From:, To:, Date: or > Message-ID: headers when not present. Postfix 2.6 > and later add these headers only when clients match > the local_header_rewrite_clients parameter setting. > Earlier Postfix versions always add these headers; > this may break DKIM signatures that cover > non-existent headers." > With 2.6.6, will it "always" add those headers if they are missing, > or only if they are missing AND the clients match the > local_header_rewrite_clients parameter?
2.6.6, though many years past EOL, is indeed later than 2.6, so WHEN [the listed headers are] NOT PRESENT they are added ONLY WHEN CLIENTS MATCH THE local_header_rewrite_clients PARAMETER SETTING. That's the default setting of "no" for always_add_missing_headers. The Postfix 2.5 and prior behavior was to ALWAYS add these headers if missing, regardless of the client address. -- http://rob0.nodns4.us/ Offlist GMX mail is seen only if "/dev/rob0" is in the Subject:
