Problems with Mail Server after migration

[ciscllc]

Hi,

I just made a migration from one server to a vserver (openvz)
both debian. Now after the migration, I have problems with my email, as i get the following errors:

hostname is ip in viceversa with - instead of .

Quote:postfix/virtual[3306]: fatal: unable to use my own hostname

I cannot change the hostname in the /etc/hostname as it will be reset after reboot (maybe an openvz fault?)

and

Quote:Dec 22 14:43:03 444-333-222-111 postfix/error[21560]: B4BE82DC0301: to=<my@mail>, relay=none, delay=139166, delays=139165/1/0/0.14, dsn=4.3.0, status=deferred (unknown mail transport error)

but with from:

Quote:Dec 22 14:38:02 444-333-222-111 postfix/qmgr[1850]: 3AA652DC033D: from=<my@mail>, size=1780, nrcpt=1 (queue active)

Regards