sendmail problem

[Baiju Kumar.B_1]

Dear friends,
we have a mail server rh-9.00 ,we cannot get the mail from some ids the following errors are getting while executing mailq command can you please suggest the reasons and solutions

errors are the following
error at mail server

1)host map: lookup (mcciapune.com): deferred


2)kAP6CGkJ005137 191478 Sat Nov 25 11:42
(host map: lookup (alphanso.net): deferred)
tushar@unix.d380.cenka.com



3)
kAP4gK9a023622 1663168 Sat Nov 25 10:12
(Deferred: Connection reset by localhost.centuryenka.com.)
rrg@unix.d380.cenka.com



4)
kAU3c00V014400 482355 Thu Nov 30 09:08
(I/O error)


5) ss@unix.d380.cenka.com
kAT6ipdc024261 23239 Wed Nov 29 12:14
(I/O error: Input/output error)
purat@unix.d380.cenka.com



regards
Baiju Kumar.B

[Ivan Krastev]

This is problem with DNS resolving - see http://www.brandonhutchinson.com/host_map__lookup_(domain)__deferred.html

regards,
ivan

[Steven E. Protter]

Shalom,

This could also be because you are doing smart host relay, which pushes all mail to an smtp relay server and the server you are attempting to relay to does not permit relay.

That needs to be checked as well.

SEP

[TANHM]

Hi Tan,

Yup, i think Ivan got a point, you have to check your resolv.conf, make sure the contents are correct. Make sure dns can resolve (use nslookup or dig) the ip or hostname or both. Next make sure the sendmail.cf did not use smart relay to another server (as u claimed that this is the mail server, not relay to another mail server), if you are using relay, make sure you can ping or resolv the relay server.

One more, make sure the sendmail daemon is running (applies when this is the mail server).