[Dovecot] Mail undeliverable error

[jan gestre]

On Mon, Feb 2, 2009 at 11:46 PM, Steffen Kaiser
<skdovecot at smail.inf.fh-brs.de> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
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> On Mon, 2 Feb 2009, jan gestre wrote:
>
>> when we transferred office, issues arose, suddenly users using email
>> clients like thunderbird/outlook suddenly can't send mail when outside
>> the office and instead gets an smtp denied or worst a mail
>> undeliverable error. The mail undeliverable error was that the
>
> Do you use Dovecot SASL in Postfix to authentificate the users? Do you use
> Dovecot deliver to drop the mail? Does the recipients are local or remote
> users?  What does postfix says in its logs about the error? When the users
> login from internal hosts, do they connect to the same port as when they
> connect from outside the office? If not, what are Postfix' config
> differences?
>
I'm no expert but I think I just use MySQL since I'm using
PostfixAdmin, correct? Whether the recipient is a local or remote when
sending mails from outside the office produces the same mail
undeliverable error result. Inside and Outside ports are the same i.e.
port 25 and 587 for smtp, 110 for pop3 and 143 for imap.

Here's my /var/log/maillog:

Feb  1 21:26:38 mail postfix/cleanup[19777]: 55E6C148049: hold: header
Received: from [127.0.0.1] (unknown [122.53.207.8])??by
mail.ddblocal.com (Postfix) with ESMTP id 55E6C148049??for
<ragestre at xinapse.net>; Sun,  1 Feb 2009 21:26:37 +0800 (PHT) from
unknown[122.53.207.8]; from=<jan.gestre at ddblocal.com>
to=<ragestre at xinapse.net> proto=ESMTP helo=<[127.0.0.1]>
Feb  1 21:26:38 mail postfix/cleanup[19777]: 55E6C148049:
message-id=<4985A3E0.7000802 at ddblocal.com>
Feb  1 21:26:38 mail postfix/smtpd[19520]: disconnect from unknown[122.53.207.8]
Feb  1 21:26:38 mail dovecot: imap-login: Login:
user=<jan.gestre at ddblocal.com>, method=plain, rip=::ffff:122.53.207.8,
lip=::ffff:192.168.1.3

Feb  1 21:26:42 mail MailScanner[17048]: Uninfected: Delivered 1 messages
Feb  1 21:26:42 mail MailScanner[17048]: MailScanner child dying of old age
Feb  1 21:26:42 mail postfix/pipe[19788]: D9A6D148050:
to=<postmaster at ddblocal.com>, relay=dovecot, delay=5.6,
delays=5.6/0.01/0/0.03, dsn=5.1.1, status=bounced (user unknown)