Host Unknown Error:Sendmail
 

Dear All,

Many of mails sent from my mail server that are in Queue;
The main reason is deffered by domains like yahoo,aol,etc.
but there is one more error that i keep getting and that is
Host Unknown,
Below is an example from mail log,
The catch is,test mail sent on the same email id sent from my personal mail from the same server i.e. varun.m@mycompanysdomain.com was delivered
However,another mail containing client information sent from customercare@mycompanysdomain ended up in queue.

There are more examples of the same,around 20 domain have the same problem.

Please Help.

Sep 7 14:33:46 server2 sendmail[24591]: n8793jiC024589: to=<abc@xyz.fi>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=163672, relay=xyz.fi., dsn=5.1.2, stat=Host unknown (Name server: xyz.fi.: host not found)

Sep 7 22:09:42 server2 sendmail[6407]: n87Gdffa006403: to=<abc@def-fgh.com>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=152474, relay=def-fgh.com., dsn=5.1.2, stat=Host unknown (Name server: def-fgh.com.: host not found)

Thank You In Advance.

Well, if you're using Yahoo, AOL, etc. for your mail relays, I'm not surprised. Your personal address doesn't send many through, so it allows it. "customercare" probably shovels through alot, so it's very suspicious, and they've blacklisted you, as a probable spammer.

Contact them, and see what's up.

thanks Tbone,

but the problem is not yahoo,aol as mails sent to these domains are deffered and are sent after a day or two,
however there are other domains which are not public...still i get this error??