I've configured my ASA5505 to allow SMTP out from and into the network. However, when I do a telnet test on port 25 to my relay server, it fails with the following (log traces):
7|Sep 04 2009|12:22:20|609002|22.214.171.124||||Teardown local-host outside:126.96.36.199 duration 0:00:30
6|Sep 04 2009|12:22:20|302014|188.8.131.52|25|10.0.0.1|11133|Teardown TCP connection 1716642 for outside:184.108.40.206/25 to inside:10.0.0.1/11133 duration 0:00:30 bytes 0 SYN Timeout
6|Sep 04 2009|12:21:50|302013|220.127.116.11|25|10.0.0.1|11133|Built outbound TCP connection 1716642 for outside:18.104.22.168/25 (22.214.171.124/25) to inside:10.0.0.1/11133 (126.96.36.199/1164)
7|Sep 04 2009|12:21:50|609001|188.8.131.52||||Built local-host outside:184.108.40.206
6|Sep 04 2009|12:21:50|106100|10.0.0.1|11133|220.127.116.11|25|access-list inside_access_in permitted tcp inside/10.0.0.1(11133) -> outside/18.104.22.168(25) hit-cnt 1 first hit [0xa0c1d109, 0x0]
7|Sep 04 2009|12:21:46|609002|22.214.171.124||||Teardown local-host outside:126.96.36.199 duration 0:00:03
6|Sep 04 2009|12:21:46|302021|188.8.131.52|0|10.0.0.1|512|Teardown ICMP connection for faddr 184.108.40.206/0 gaddr 220.127.116.11/15949 laddr 10.0.0.1/512
6|Sep 04 2009|12:21:43|302020|10.0.0.1|512|18.104.22.168|0|Built outbound ICMP connection for faddr 22.214.171.124/0 gaddr 126.96.36.199/15949 laddr 10.0.0.1/512
7|Sep 04 2009|12:21:43|609001|188.8.131.52||||Built local-host outside:184.108.40.206
6|Sep 04 2009|12:21:43|106100|10.0.0.1|8|220.127.116.11|0|access-list inside_access_in permitted icmp inside/10.0.0.1(8) -> outside/18.104.22.168(0) hit-cnt 1 first hit [0x76bccdc9, 0x0]
I know that this relay server is accessible from other networks with ASAs at the edge. Is there a config error somewhere?
BTW, incoming SMTP works totally fine.