There are several ways of doing what you want... - Setup the firewall rules so that the external interface rejects anything on port 25 unless it comes from an internal or local address - Setup Sendmail so that it only listens on the local network card (look in the sendmail.cf files for these rules - or use the M4 file to set it up). - Setup Sendmail on an internal server.
You will need to set-up your sendmail server so that it will relay traffic for the old sites (like Mindspring). To do this, edit the file /etc/mail/relay-domains and add the domains that you will relay for. Have fun - Jon ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, February 11, 2002 9:31 AM Subject: [TriLUG] mail relaying > At last count between myself and my wife we download mail from roughly seven pop accounts. Since connecting to Roadrunner I can no longer send all my mail, regardless of the return address, through my old mindspring SMTP outgoing mail server and Roadrunner won't forward mail from e-mail addresses other than xx.rr.com. > > From everything I've read setting up a firewall to forward mail is A Very Bad Thing mostly because of fears of people using your SMTP mail server for mail spamming. > > I am running Red Hat 7.1 on my current firewall. I have two ethernet cards: eth0 and eth1. Is there a way to set up my server to forward mail that arrives only on eth1 (inside link) while blocking all forwarding requests coming from eth0? > > I've read some of the man pages and looked through my "Linux Bible" book but I can't find any instructions on how to set this up - just information on why I shouldn't do this. > > Any thoughts, pointers, or suggestions? > > Any help would be greatly appreciated. > > Thanks! > > Greg > _______________________________________________ > TriLUG mailing list > http://www.trilug.org/mailman/listinfo/trilug
