> -----Messaggio originale----- > Da: owner-postfix-us...@postfix.org [mailto:owner-postfix- > us...@postfix.org] Per conto di Noel Jones > Inviato: lunedì 30 luglio 2018 20:15 > A: postfix-users@postfix.org > Oggetto: Re: R: Rewrite header From: > > On 7/30/2018 8:19 AM, Scappatura Rocco wrote: > > > > > >> -----Messaggio originale----- > >> Da: owner-postfix-us...@postfix.org [mailto:owner-postfix- > >> us...@postfix.org] Per conto di Wietse Venema > >> Inviato: lunedì 30 luglio 2018 15:06 > >> A: Postfix users <postfix-users@postfix.org> > >> Oggetto: Re: Rewrite header From: > >> > >> Scappatura Rocco: > >>> Hello. > >>> > >>> My mail server received unsollecited emails with header From: > >>> similar to > >> 'Heidi <info>'. > >>> > >>> Users perceive that email comes from our company as the header From: > >> has been rewrite in 'Heidi <i...@host.domain.tld>'. > >>> > >>> Infact: > >>> > >>> myorigin = $mydomain > >>> mydomain = host.domain.tld > >>> > >>> and > >>> > >>> append_at_myorigin = yes > >>> local_header_rewrite_clients = permit_inet_interfaces > >>> > >>> Is there a way to block incoming e-mails whose 'Header From:' does > >>> not > >> specify valid email address? > >>> > >> > >> Perhaps the following will do the job: > >> > >> /etc/postfix/main.cf: > >> remote_header_rewrite_domain = domain.invalid > >> > >> but it may have no effect on an smtpd_proy_filter based content filter. > > > > Thanks Wietse > > > > My configuration does not use smtpd_proxy_filter at all. > > > > So I think I can set: > > > > remote_header_rewrite_domain = domain.invalid > > > > or it could be better to set: > > > > remote_header_rewrite_domain = > > Setting "remote_header_rewrite_domain = domain.invalid" prevents other > software from rewriting the header once it leaves postfix, and should make it > clear that the domain is invalid even to unsophisticated users. > > Some users may confuse a missing domain as meaning @local. > > > > > > What is the difference simply explained? > > > > And, if I have well understood, it could be also a solution for my issue > > also > to set: > > > > local_header_rewrite_clients = permit_mynetworks > > > > So that local generate emails will have header From: correctly rewritten, > while email coming from outside will not have header From: rewritten.. > > > > Correct? > > Setting "local_header_rewrite_clients=permit_mynetworks" is the default. > > Note that if mail enters postfix multiple times, such as after a > content_filter > or some other external process such as a spam filter, the second trip through > postfix will be from $mynetworks, causing empty domains to be rewritten to > the local domain. That's another good reason to use > "remote_header_rewrite_domain = domain.invalid".
Thank you for the clarification! > > > > > -- Noel Jones Regards, Rocco
