Add signature to outbound email

[My-dial-up]

My original post from 'The Absolute Beginner section';

http://ubuntuforums.org/showthread.php?t=132062

I was advised to repost here.

I'm using Ubuntu as a mail relay for all my in/outbound email. How can I add a signature to all outbound email?

I'm using postfix, and all intranet/internet email passes through postfix on the ububtu server. At work we have half a dozen XP PCs all using this server, what I've been asked to do is add a 'disclaimer' on all outbound emails.

Using the signature option in Outlook isn't an option as this can be modified on each PC.

Can anyone help please?

[robert_pectol]

You're asking the MTA to do something it has no business doing! Message body content should never be altered by the MTA. You're better off using a separate piece of software to do it for you, such as alterMIME:
http://www.pldaniels.com/altermime/
I've never used it before but it claims to be able to do what you want. Good luck.