MailScanner as mail proxy

[Marc Lucke]

Thank you both Steve & Michele - I'll look at those milters.  I'm 
particularly happy for the recommendation and am not unhappy to pay for 
a well written product.


Marc

Marc Lucke wrote:
> Hi list,
>
> I know this is getting off topic.  I know enough about sendmail to be 
> 99% sure that this question should be on their list.  But any help, 
> ideas or feedback would be welcome.  I'm guessing the MailScanner 
> community would have come across my problem on more than 1 occasion.
>
> I run MailScanner on a remote machine to my actual mailserver.  In 
> other words all mail is relayed via the Mailscanner box.  This is to 
> stop viruses and spam on the mailserver I have to run which is very 
> limited in such defenses.  It all works great, apart from one annoying 
> problem:  if someone sends to an unknown email account (as oft occurs) 
> the MailScanner proxy (for want of a better way to describe it as I'm 
> using it) first accepts the email, attempts delivery, cannot deliver 
> and then tries to notify the sender who doesn't exist.  So I'm 
> lumbered with a billion postmaster non-delivery emails.  I'm keeping 
> up with this quite well, but I'm scared I'll miss a legitimate message 
> because it's buried in garbage.
>
> Is there anything I can do to get anything in MailScanner to check 
> with my destination email server that the actual account exists before 
> accepting the email in the first place?
>
>
> Marc