The list ate my first attempt....
On Fri, 8 Dec 2000, tom burkart wrote:
> Peter Rundle said:
>
> > without any tampering, others however are obviously evil and their
> > mail must go via the corporate server to have whatever degrading
> > indignaties are to be imposed on them (virus scanning, long winded
> > legalise tacked on the end, all nudie pictures removed etc...)
> This can all be done with libmilter (part of the sendmail distribution).
>
> > you have to put OSS between "commercial" software and the internet to
> > stop it from becoming spam central. ;-)
> Sendmail these days comes with a lot of SPAM stomping features...
>
> > Of course a smart user might try to set their "mail from" to something
> > else and put a quite note in the body of the message requesting the
> > recipient not reply to the envelope address but to the address written
> > ...
> > this doesn't match the envelop "mail from" something nasty might happen
> > to their e-mail...
> libmilter again.
>
> > Now the tricky bit, if the "mail from" is NOT in the "naughty users
> > list"
> > their mail gets released to the ether undamaged, otherwise, their mail
> > is
> > routed to the corporate server for appropriate tampering before heading
> > out.
> ditto.
>
> All you have to do is to write a mail filter program that does all this
> (or multiples that do a bit at a time). Ok, this is a pretty new feature
> in sendmail but I am working on one that does virus scanning... The guys
> who wrote the scanner have actually used a rather clever feature in
> sendmail so they can use a mailer to send all the mail to the mailer first
> and the mailer re-injects the mail into sendmail who then delivers it to
> the final destination. That way all the mail goes through the mailer who
> can do with it as it pleases (including throwing it into a black hole).
>
> Ok, this is more than just tweaking the *.cf file... My statement was
> that it can be done. BTW, I have dealt with both sendmail and qmail and
> my choice is sendmail. Yes, I know, the learning curve for sendmail IS
> much steeper but it is much more feature-rich (and potentially
> bug-prone). Further, I do have to refer to the doco quite often as I
> DON'T remember everything about it.
tom.
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