> Subject: Re: Postfix's SMTP outbound mail filtering of header content> To:
> postfix-users@postfix.org> Date: Mon, 17 Nov 2008 17:35:20 -0500> From:
> [EMAIL PROTECTED]> > Wietse:>> As documented, smtp_header_checks etc. cannot
> change the destination.>> >> Destination changes would not make sense,
> because the checks happen>> while mail is being delivered.> > Charles
> Account:>> If I create a second relay-smtp queue that is configured to be a>>
> relay to deliver mail to my MTA, can I use smtp_header_checks in>>
> conjunction with cleanup to determine recipient's destination is>> not local,
> if so, deliver to relay-smtp queue?> > As documented, smtp_header_checks are
> implemented by the SMTP client> while Postfix delivers mail. As documented,
> this cannot change the> destination. It can change the message by prepending,
> replacing or> ignoring a message header.> > As documented, header_checks are
> implemented by the cleanup daemon> while Postfix receives mail. As
> documented, this can change the> destination.> > WietseWietse,Thanks for
> the information. I was originally looking at header_checks but as Iunderstand
> the feature, it may not support (please correct me if I'm wrong)the function
> I am looking to implement.I am running Postfix with zimbra, our milter checks
> for specific content, etc.If it exists, it is allowed to be delivered to the
> local lmtp queues, however,as for company policy, it must be run through a
> black box service beforebeing sent outside the company. The milter will put
> an RFC822 X-headerin the message to indicate additional checks are required.
> The problem iswe don't want all mail sent outside to be run through the black
> boxbecause of the load (a different department and that's what the folksare
> telling me).As I understand header_checks is it affects the all recipients
> and weare not required to check internal mail by the black box. The only
> solution I can devise, is to have all outbound smtp traffic sentto an
> intermediate sendmail server, which I can configure to forwardmail traffic
> containing the RFC822 X-header to the black box andall other mail delivered.
> I personally don't want to stand up anotherserver because of costs but since
> I'm still understanding all of postfix'smany features, I haven't found
> anything.Do you see an alternative within postfix?Thanks in advance for
> helping out a postfix novice.Charles
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