Can Postfix be made "invisible"?

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Hello All,

I realize that I might get flamed on this one - but am curious none-the-less.

I am setting up a anti-spam testing lab, and will be testing anti-spam software in parallel. I am using Postfix as my main SMTP gateway and so far it is fantastic - I am able to receive mail from multiple domains and duplicate them transparently to any number of downstream servers. This is important in order for each anti-spam server to be compared accurately to each other (they all receive the exact same mail at the same time).

I have a single public IP address on my firewall, and the remaining IPs (including Postfix) is on a 192.168.1.x /24 network. It works great.

Here is my question. I would love to be able to make Postfix "Invisible" - in other words, remove the "Received:" header that is applied to the mail message by the Postfix MTA (this I did already using the IGNORE function in header_checks, no worries there!).

Here is the tricky part. Can I propagate the incoming message identification (IP and hostname) that is coming into the Postfix server to the downstream antispam servers? In other words server that sends the message to my domain will then be the mydestination for my Postfix server! It almost seems doable - with regexp and the mydestination line in main.cf... I know it wouldn't be that easy - if possible at all it would require something else...

Heck, I thought I would ask! It's not critical to me currently, but is something that is interesting and might be technically possible.

Thanks in advance,

Jason Pappalexis

PS. The motivation for this is to keep the antispam products as close to the gateway as possible - the necessity to duplicate the email with Postfix means another server in the middle, if it could be made transparent I have the best of both worlds.



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<DIV>Hello All,</DIV>
<DIV>&nbsp;</DIV>
<DIV>I realize that I might get flamed on this one - but am curious none-the-less.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I am setting up a anti-spam testing lab, and will be testing anti-spam software in parallel.&nbsp; I am using Postfix as my main SMTP gateway and so far it is fantastic - I am able to receive mail from multiple domains and duplicate them transparently to any number of downstream servers.&nbsp; This is important in order for each anti-spam server to be compared accurately to each other (they all receive the exact same mail at the same time).</DIV>
<DIV>&nbsp;</DIV>
<DIV>I have a single public IP address on my firewall, and the remaining IPs (including Postfix) is on a 192.168.1.x /24 network.&nbsp; It works great.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Here is my question.&nbsp; I would love to be able to make Postfix "Invisible" - in other words, remove the "Received:" header that is applied to the mail message by the Postfix MTA (this&nbsp;I did&nbsp;already using the IGNORE function in header_checks, no worries there!).</DIV>
<DIV>&nbsp;</DIV>
<DIV>Here is the tricky part.&nbsp;&nbsp;Can I propagate the incoming message identification (IP and hostname) that is coming into the Postfix server to the downstream antispam servers?&nbsp; In other words server that sends the message to my domain will then be the mydestination for my Postfix server!&nbsp;&nbsp; It almost seems doable - with regexp and the mydestination line in main.cf...&nbsp; I know it wouldn't be that easy - if possible at all it would require something else...</DIV>
<DIV>&nbsp;</DIV>
<DIV>Heck, I thought I would ask!&nbsp; It's not critical to me currently, but is something that is interesting and might be technically possible.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Thanks in advance,</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jason Pappalexis</DIV>
<DIV>&nbsp;</DIV>
<DIV>PS.&nbsp; The motivation for this is to keep the antispam products as close to the gateway as possible - the necessity to duplicate the email with Postfix means another server in the middle, if it could be made transparent I have the best of both worlds.</DIV>
<DIV>&nbsp;</DIV><p>
<hr size=1>Do you Yahoo!?<br>
<a href="http://us.rd.yahoo.com/mail_us/taglines/50x/*http://promotions.yahoo.com/new_mail/static/efficiency.html">Yahoo! Mail</a> - 50x more storage than other providers!
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