Hi Gurus,

I need some help configuring sendmail to be able to receive external mail from say "gmail".

I've already tried opening iptables:
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 25 -j ACCEPT

and I edited the sendmail.mc to:

dnl # DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl


When I run netstat i get:

netstat -nl

tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN

I don't get why i can't receive any emails from the outside still when i check "mail" i have none. If i try to scan port 25 from the outside also, i get that port 25 is not responding (maybe its because sendmail is already using it?) I also tried adding an addr field in sendmail.mc to include my domain ip but to no avail so i took it off and now it's 0.0.0.0.
The DNS Ip addresses are also in the resolv.conf file so I don't think thats the problem.

I'd be glad if someone could help me out I've been pulling my hair out all day

Why you are not allowing all incoming and outgoing traffic for port 25

iptables -I INPUT -p tcp --dport 25 -j ACCEPT
iptables -I OUTPUT -p tcp --sport 25 -j ACCEPT

Thanks

I tried it but it still doesn't work.

I thought maybe it was selinux related but I don't think so..

Ah the joy..

If you are not able to telnet your ip on port 25 from outside, Then it could be OS Firewall or network firewall . Since OS Firewall is ok so check with network firewall.

Thanks