Peter Burden wrote:
>      The request is from senior management who are concerned that mail
>      users can send out e-mail in which they have awarded themselves
>      inappropriate job titles. Would it possible to make Courier append a
>      standard signature (taken from a database) to outgoing e-mail, once
>      users had authenticated themselves?

You could append a signature using a filter.  You'd have to make sure 
that none of your users netblocks were listed as RELAYCLIENTs in 
smtpaccess, forcing them to use SMTP AUTH in order to relay mail.

However, even with all of that done, there's little or nothing stopping 
your users from sending email from somewhere else.  You probably have 
too much senior management... they seem to be getting bored and worrying 
about non-existent threats.

Tell them that it's a waste of time and money, and that while you can 
append signatures, you can't force anyone to submit to using them.

> Failing that would it be possible
>      to examine outgoing e-mail and drop messages that didn't include the
>      senders "approved" signature.

Sure.  Slightly easier, but no less easily circumvented.

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