OK. so im using squirrelmail and i can send out to other domains, no problem. I love it.... problem is, i cannot receive anything...

I enabled port forwarding on my linksys router for port 25) just the way i did for 80, 22, etc..

and I took a look at my IPtables config and that doesn't seem to be blocking anything;


[root@audrey root]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
RH-Lokkit-0-50-INPUT all -- anywhere anywhere

Chain FORWARD (policy ACCEPT)
target prot opt source destination
RH-Lokkit-0-50-INPUT all -- anywhere anywhere

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain RH-Lokkit-0-50-INPUT (2 references)
target prot opt source destination
ACCEPT udp -- milwwi-dns-cac-02-dmfe01.wi.rr.com anywhere udp spt:domain dpts:1025:65535
ACCEPT udp -- milwwi-dns-cac-02.wi.rr.com anywhere udp spt:domain dpts:1025:65535
ACCEPT udp -- milwwi-dns-cac-01.wi.rr.com anywhere udp spt:domain dpts:1025:65535
ACCEPT tcp -- anywhere anywhere tcp dpt:smtp flags:SYN,RST,ACK/SYN
ACCEPT tcp -- anywhere anywhere tcp dpt:http flags:SYN,RST,ACK/SYN
ACCEPT tcp -- anywhere anywhere tcp dpt:ftp flags:SYN,RST,ACK/SYN
ACCEPT tcp -- anywhere anywhere tcp dpt:ssh flags:SYN,RST,ACK/SYN
ACCEPT all -- anywhere anywhere
REJECT tcp -- anywhere anywhere tcp dpts:0:1023 flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable
REJECT tcp -- anywhere anywhere tcp dpt:nfs flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable
REJECT udp -- anywhere anywhere udp dpts:0:1023 reject-with icmp-port-unreachable
REJECT udp -- anywhere anywhere udp dpt:nfs reject-with icmp-port-unreachable
REJECT tcp -- anywhere anywhere tcp dpts:x11:6009 flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable
REJECT tcp -- anywhere anywhere tcp dpt:xfs flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable


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Any ideas? sendmail _is_ running, thouh i didn't touch it's conf at all, as I don't know how to use it (or even if the system is using sendmail to sniff for new incoming mail *shrug*

Uh - sendmail /usually/ runs, but doesn't necessarily recieve mail from external servers by default. First, check if "sendmail" is running. (If it's configured, it will always be running). Second, check the "sendmail.cf" configuration file, and see if there are any notes there that mention you need to manually configure any specific settings.

Assuming everything else is working - it still may not work... Why!? You need an MX DNS record to point to your IP, if you don't manage your own IP addresses this is hard to get. Also, your ISP may simply block all inbound port 25 traffic for you (to help prevent SPAM).

Basic test - "telnet IPADDRESS 25" - see if sendmail answers. You may have to go to a buddies house to test it through your own router.