OT sendmail header removal

Gary Pentland gary at sgluk.com
Tue Jan 5 16:21:58 GMT 2010

>From what I remember you cannot remove headers in cf code, in a normal sendmail.

There are some source code edits in google YMMV but I would go about this.

If I had to do it and bend a few RFCs as a result, I'd do it via a milter, MIMEdefang using a bit of perl is probably simplest.


-----Original Message-----
From: mailscanner-bounces at lists.mailscanner.info [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Jethro R Binks
Sent: 05 January 2010 16:01
To: MailScanner discussion
Subject: Re: sendmail header removal

On Tue, 5 Jan 2010, Steven Andrews wrote:

> I've got a couple sendmail/mailscanner boxes that we use to front end 
> our exchange boxes inbound and outbound.  We've run into a problem with 
> any email going to mxlogic.net's clients as they do a deep header 
> analysis and find private IPs in the headers and then the block based on 
> that.
> This has happened multiple times and we always have to involve the 
> receiving customer in the conversation with mxlogic to get it fixed on a 
> per domain basis, and then months later it just comes back.  They know 
> they're not supposed to block based on that, but they really don't care.

Suggest informing the clients of mxlogic's broken attitude.  What an 
ironic name for a company.  Can't say I would have much faith in their 

You might have more luck asking your question on a sendmail list though.


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Jethro R Binks
Computing Officer, IT Services, University Of Strathclyde, Glasgow, UK
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