Our queue is growing due to failed smtp connections. There are two main reasons:
(1) there is an smtp server but it's refusing us to connect to it, and (2) the
domain has no smtp server to connect to. See below for examples. The queue keeps
growing and syslog is reporting a lot of
"Sorry,_I_wasn't_able_to_establish_an_SMTP_connection."
Can anyone please advice what to do?
Thanks,
Fred
telnet po.netnet.com.sg 25 -- fails
telnet mail.teen-mail.com 25 -- fails
# nslookup -type=MX lists.hearme.com
Server: dns1.telia.com
Address: 194.22.190.10
hearme.com
origin = hearme.com
mail addr = hostmaster.hearme.com
serial = 2000021800
refresh = 3600 (1 hour)
retry = 900 (15 mins)
expire = 864000 (10 days)
minimum ttl = 900 (15 mins)
# nslookup -type=MX server.snap.com
Server: dns1.telia.com
Address: 194.22.190.10
Authoritative answers can be found from:
snap.com
origin = sv-ns1.snap.com
mail addr = hostmaster.snap.com
serial = 2000022103
refresh = 900 (15 mins)
retry = 600 (10 mins)
expire = 2592000 (30 days)
minimum ttl = 900 (15 mins)
