Not able to receive emails on zimbra

[abhiz]

Hi all suddenly my zimbra server stop receiving email and I am not getting error in logs when I am tring to send email to email account on my server mail get bounced and I am getting error


This is the mail system at host xyz.com.

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

<aamralkar@xyz.com>: Host or domain name not found. Name service error
for name=xyz.com type=A: Host found but no data record of requested
type

[uxbod]

Something has changed with your DNS so please post the following

cat /etc/hosts
cat /etc/resolv.conf
dig yourdomain mx
dig yourdomain any
host `hostname` <- note backticks and not single quotes

[abhiz]

Some hw I manage to receive emails.