sendmail doesn't send email to specific domain email address

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http://askubuntu.com – We have ubuntu 12.04 server and installed sendmail to send mails from this server. Problem: There is some strange issue on mail server. Somehow, server not able to send email to [email protected] but server sends email successfully to other email ids like [email protected], [email protected] or [email protected] Success Case: when send email to [email protected] Dec 28 11:40:49 ip-10-99-66-252 sm-mta[16954]: qBSBemdx016952: to=, ctladdr= (33/33), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=120352, relay=aspmx.l.google.com. [], dsn=2.0.0, stat=Sent (O (HowTos)