DNS for sendmail?

puzz_1 · 06-01-2003, 01:55 AM

I am trying to setup sendmail on my linux box which is connected to a NAT enabled router. I have the router configured so it forwards port 25 to my linux box. Right now I use /etc/hosts to resolve IP's.
But if I were to use outlook or such, I probably have to use something like....
smtp.myIPaddress or smtp.mydomain

Do I have setup DNS for my LAN so that the smtp is resolved to the correct linux machine that is running sendmail?

markus1982 · 06-01-2003, 02:36 AM

Well it would make sense installing a DNS server. There is a hosts file in Windows also AFAIK but a DNS server is a cleaner solution!

puzz_1 · 06-02-2003, 04:39 AM

What about external machines. If they were to use smtp.mydomain.com and my ISP just resolves the mydomain.com part? how does the smtp part get resolved. Do I have to set up DNS for my lan??

acid_kewpie · 06-02-2003, 04:54 AM

you'd have an MX record setup at your DNS provider, either locally or at your registrar.