qmail and signatures

Colin Campbell sgcccdc at citec.qld.gov.au
Tue Sep 23 17:23:21 PDT 2003


On Mon, 22 Sep 2003 21:54:39 -0800
"W.D. McKinney" <dee at akwireless.net> wrote:

> Michael,
> Did you ever get your question answered ?
> Dee
> On Fri, 2003-09-12 at 07:17, Michael Sig Birkmose wrote:
> > Hi,
> > 
> > I don't know if this is a good place to ask this question or if I should do
> > it at an qmail site...
> > 
> > Anyhow we are setting up an server (running FreeBSD of course) with qmail as
> > MTA. We are interested in adding signatures to all our outgoing emails.
> > Is this possible to do on a SMTP level with qmail? The tricky part is that
> > it would be very nice if signatures also gets added to html mails...

This question is asked frequently on the postfix-users list. The answer is that
you can't do it reliably. If the message is plain text you are fine but once you
introduce MIME you have problems. You can't just tack the signature on the
bottom because it breaks all the mime encoding. You have to basically
disassembl;e the message and reassemble it with a new mime section, the
signature. This can conveniently be done using a content filter.

Colin Campbell
Unix Support/Postmaster/Hostmaster
+61 7 3227 6334

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