I have some problem while installation Zimbra
in scenario gmail to our mailserver
This is the mail system at host mail.imtl.skku.ac.kr.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
: Host or domain name not found. Name service error for
name=mail.imtl.skku.ac.kr type=A: Host not found
Final-Recipient: rfc822; firstname.lastname@example.org
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service error
for name=mail.imtl.skku.ac.kr type=A: Host not found
somebody help me..!