mail problem

[zomb]

Hello,
I am doing the mail server on my dedicatet server.
http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-debian-lenny-p5
All over beige errors, but if you want to log in:
http://zproject.pl/squirrelmail/src/login.php
I have error:
"ERROR: Connection dropped by IMAP server."
I already have e-mail on this domain (zproject.pl) on google apps. what do I schedule a entries in the DNS configuration? (MX entries, A. ..)
Reguards

[falko]

Any errors in your mail log?

[zomb]

cope with this error. Now there is another problem. Jeśli wysyłam poczte np. z o2.pl do zomb@zproject.pl dostaje wiadomość zwrotną:
This is the mail system at host mail.zproject.pl.

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

<zomb@zproject.pl>: mail for mail.zproject.pl loops back to myself


my main.cf:
http://wklej.org/hash/bb70d9ae0bf/txt/

any errors:
Mar 14 00:25:16 zproject postfix/trivial-rewrite[2902]: warning: do not list domain zproject.pl in BOTH mydestination and virtual_alias_domains
Mar 14 00:25:16 zproject postfix/trivial-rewrite[2902]: warning: do not list domain zproject.pl in BOTH mydestination and virtual_mailbox_domains
.......
Mar 14 00:25:17 zproject postfix/smtp[2903]: 1E54438058: to=<root@zproject.pl>, relay=none, delay=0, delays=0/0/0/0, dsn=5.4.6, status=bounced (mail for mail.zproject.pl loops back to myself)

[falko]

<zomb@zproject.pl>: mail for mail.zproject.pl loops back to myself Please add mail.zproject.pl to the mydestination line in /etc/postfix/main.cf.

Mar 14 00:25:16 zproject postfix/trivial-rewrite[2902]: warning: do not list domain zproject.pl in BOTH mydestination and virtual_alias_domains
Mar 14 00:25:16 zproject postfix/trivial-rewrite[2902]: warning: do not list domain zproject.pl in BOTH mydestination and virtual_mailbox_domainsIf you want to use zproject.pl for virtual users, remove it from the mydestination line and leave it in the database. If you want to use it for system users, remove it from the database and leave it in mydestination. You cannot use it for both virtual and system users at the same time.

[zomb]

ok...
I have in main.cf:
mydestination = localhost.$mydomain, localhost, mail.zproject.pl, zproject.pl
If I send mail from o2.pl to zomb@zproject.pl mail does not reach, if I send mail from o2.pl to zomb@mail.zproject.pl mail reach. What can I do to @zproject.pl also reached?

[falko]

Remove zproject.pl from the mydestination line.