senmail doesn't works ok

[Carme Torca]

Hi,

I have 2 servers serverA and serverB. serverA sends mails to serverB and after serverB sends to another server serverC.

When send mails from serverA, it shows this messages, and doesn’t arrive.


“May 19 13:06:01 serverB sendmail[27997]: NAA27997: from=, size=467, class=0, pri=30467, nrcpts=1, msgid=<200505191106.NAA01829@serverA.cpd.sal.net>, proto=ESMTP, relay=root@pserverA [192.168.38.3]
May 19 13:06:01 serverB sendmail[27999]: NAA27997: to=, delay=00:00:00, xdelay=00:00:00, mailer=smtp, relay=t-systems.es, stat=Host unknown (Name server: t-systems.es: host not found)
May 19 13:06:01 serverB sendmail[27999]: NAA27997: NAA27999: DSN: Host unknown (Name server: t-systems.es: host not found)
May 19 13:06:01 serverB sendmail[27999]: NAA27999: to=, delay=00:00:00, xdelay=00:00:00, mailer=smtp, relay=serverA.cpd.sal.net. [192.168.38.7], stat=Sent (NAA01848 Message accepted for delivery)”

If I send messages from serverB, its arrives ok.
Does anyone could help me??

In sendmail.cf of serverA I have:

DS serverB.cpd.sal.net

In sendmail.cf of serverB I have:
DS

Thanks!
Car

[Naveej.K.A · Accepted solution]

Hi,

From serverA do an

nslookup serverB

see how it is getting resolved and post the output.

Regards,
--Naveej

[Gopi Sekar]

Let me set the context: you have sent mail from serverA and you are expecting to receive it on serverC through serverB. correct me if i am wrong.

The output what you have pasted is it from ServerB alone?

Host unknown and Host Not found messages generally appear if the host name can not be resolved by serverA, which means DNS setting on serverA is wrong.

Regards,
Gopi

[Carme Torca]

Thanks every one!!
You are right I cannot resolve the name of the server, I have modify /etc/hosts and then I have do sendmail stop and start, and now I works ok.