1 src 2 dest

[Brad Chapman]

Mr. Schaaf,

   Huh? I seemed to have read about a SAME target which allowed you to
duplicate and resend packets to a different IP address. I believe it
performs exactly what this guy wants: to be able to deliver multiple
e-mails to different servers. The only drawback, AFAICE, is that it
requires multiple rules for multiple e-mail servers; however, AFAIK, this
multiple-delivery SMTP server you describe could fix that dynamically.....

Brad

Patrick Schaaf wrote:

>> so for example if I had a mail server on the outside of a iptables 
>> firewall, and I sendmail to this mail server, I want same mail delieved 
>> to  that server and another mail server aswell.
> 
> 
> This cannot be done at a packet filtering level. You could use the
> REDIRECT rules to capture the outgoing SMTP connection, handle it
> using an SMTP server on the firewall machine, and write this SMTP
> server in a way that stably feeds each outgoing mail to the two
> external servers (essentially duplicating the mail, and running
> two independant deliveries). I don't know of any SMTP server
> software capable of doing that out of the box, so you probably
> have to find a knowledgeable programmer who writes it for you.
> For a competent person, that should 1-2 man-weeks work.
> 
> regards
>   Patrick
> 
> 
>