Preventing multiple signatures in email conversation?

Julian Field MailScanner at
Mon Apr 27 18:04:31 IST 2009

On 27/04/2009 17:42, Chris Barber wrote:
> Is there a way to get MailScanner to not put multiple signatures? Like
> detect that there is already one on the message and not append
> subsequent signatures? I would rather not rely on the email clients to
> do this...
I think this has already been mentioned in this thread. But...
With an HTML signature, it's easy as you can insert some hidden text in 
the sig that doesn't appear in the viewed result, and use that as an 
identifier to say "Here is the sig, don't add another one".
But in a plain text message, it's a lot harder as there is no way of 
putting in hidden text, and once the message has been badly quoted by 
some mail client when the reply was done, you can't reliably 
automatically find the original signature in it.
When you're passing through multiple MailScanner servers in the same 
organisation, you can do it with a header. But you can't trust the 
contents of any header once you've been outside your organisation, as 
many environments throw away most headers, particularly when the message 
has been replied to.

In the cases of multiple MailScanner servers, and HTML signatures, I can 
and already have solved the problem. There just isn't a neat way of 
doing it for plain text signatures, sorry.

If you have any stunning ideas, then let me know :-)


Julian Field MEng CITP CEng
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MailScanner customisation, or any advanced system administration help?
Contact me at Jules at Jules.FM

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