Signing messages by domain/MRTG

David Sullivan David.Sullivan at BARNET.AC.UK
Mon Jun 17 17:17:26 IST 2002

On 17 Jun 2002 at 16:00, Steve Freegard wrote:

> I'm trying to pursuade the IT director to get rid of our existing SMTP
> gateway (WinNT+MIMEsweeper for SMTP+Sophos) and to replace it with RedHat
> Linux, Sophos, MailScanner and SpamAssassin and there were a couple of
> things that I was wondering about MailScanner:
> 1) Is it possible to sign messages only were 'from' certain domains - e.g.
> to add a legal disclaimer to all messages from my internal domains but not
> to mail coming in from external sources??

We do this using a combination of exim's ability to use a different transport
based on the domain and altermime to achieve the huge chunk of disclaimer you
will see at the bottom of this message. Achieving the same using sendmail (or
other MTA of choice) is an exercise for the reader ...

David Sullivan        IT Services, Barnet College, London
                            David.Sullivan at
                            020 8275 5036

This communication may contain privileged or confidential information which
is for the exclusive use of the intended recipient.  If you are not the
intended recipient, please note that you may not distribute or use this
communication or the information it contains.  If this e-mail has reached you
in error, please delete it and any attachment.

Internet communications are not secure and Barnet College does not accept
legal responsibility for the content of this message.  Any views or opinions
expressed are those of the author and not necessarily those of Barnet College.

Please note that Barnet College reserves the right to monitor the
source/destinations of all incoming or outgoing e-mail communications.

More information about the MailScanner mailing list