Re: Postfix's SMTP outbound mail filtering of header content
On Tue, Nov 18, 2008 at 02:24:38PM +, Charles Account wrote: 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. This calls for a 2.5 stage Postfix: input --- output destination | | v scrutiny -- destination The X-Header is added between the input and output stages (via a milter in the input stage, or a content_filter between the input and output stages). The output stage Looks for the X-Header and if present, shunts mail into the scrutiny stage, otherwise delivers to the real destination. I would use three separate Postfix instances for this, but it can be done with multiple services in a single instance. In most of my systems that are similar, the scrutiny stage is actually a quarantine, and mail does not leave directly from there, but the idea is the same... -- Viktor. Disclaimer: off-list followups get on-list replies or get ignored. Please do not ignore the Reply-To header. To unsubscribe from the postfix-users list, visit http://www.postfix.org/lists.html or click the link below: mailto:[EMAIL PROTECTED] If my response solves your problem, the best way to thank me is to not send an it worked, thanks follow-up. If you must respond, please put It worked, thanks in the Subject so I can delete these quickly.
Postfix's SMTP outbound mail filtering of header content
Hi Gurus, Can Postfix's SMTP process (outbound delivery) perform header_checks and relay the message to a specified MTA? Based on what I've read in the man pages for header_checks this implemented by cleanup process and doesn't seem to solve my problem. My scenario, I have an RFC822 X-header that is add by a milter. If the RFC822 X-header is set, and it is queued to the SMTP process (not deposited locally), I would like message to be sent to a secondary MTA for further processing. Can I do this by adding a filter/header_check to master.cf's smtp configuration? Charles _ Get 5 GB of storage with Windows Live Hotmail. http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_5gb_112008
Re: Postfix's SMTP outbound mail filtering of header content
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. Wietse
RE: Postfix's SMTP outbound mail filtering of header content
Subject: Re: Postfix's SMTP outbound mail filtering of header content To: [EMAIL PROTECTED] Date: Mon, 17 Nov 2008 16:13:19 -0500 CC: postfix-users@postfix.org From: [EMAIL PROTECTED] 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. Wietse 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? Charles _ Color coding for safety: Windows Live Hotmail alerts you to suspicious email. http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety_112008
Re: Postfix's SMTP outbound mail filtering of header content
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. Wietse
