Mailtransfer to AOL bounced

[Oneman]

Hello
I have a little problem with the mail transfer to AOL and other domains.
The post boxes are available for reporting unaviable from other servers.
I get following error messages.
Shipments to GMX or so works fine.
When I use the email address through our other mail server (GroupWise) address them work and I get no error messages.

I use zimbra on an Ubuntu system in a DMZ.

Can you help me.


Regards
Oneman

Sep 23 08:49:10 monbaca postfix/qmgr[7883]: 93773435AA: from=<ulrike.isdepski@mcgboenen.de>, size=1260, nrcpt=1 (queue active)
Sep 23 08:49:10 monbaca postfix/qmgr[7883]: 7BE69435E1: from=<manuela.schroeder@mcgboenen.de>, size=564105, nrcpt=50 (queue active)
Sep 23 08:49:10 monbaca postfix/smtp[21244]: 93773435AA: host mailwall.digionline.de[62.96.182.69] said: 450 Requested mail action not taken: mailbox unavailable (in reply to RCPT TO command)
Sep 23 08:49:10 monbaca postfix/smtp[21246]: 7BE69435E1: host mailwall.digionline.de[62.96.182.69] said: 450 Requested mail action not taken: mailbox unavailable (in reply to RCPT TO command)
Sep 23 08:49:10 monbaca postfix/smtp[21246]: 7BE69435E1: to=<t.bienert@mcgboenen.nw.lo-net2.de>, relay=mailwall.digionline.de[62.96.182.24]:25, delay=246246, delays=246246/0.04/0.12/0.05, dsn=4.0.0, status=deferred (host mailwall.digionline.de[62.96.182.24] said: 450 Requested mail action not taken: mailbox unavailable (in reply to RCPT TO command))
Sep 23 08:49:10 monbaca postfix/smtp[21244]: 93773435AA: to=<t.bienert@mcgboenen.nw.lo-net2.de>, relay=mailwall.digionline.de[62.96.182.24]:25, delay=1129, delays=1128/0.08/0.15/0.05, dsn=4.0.0, status=deferred (host mailwall.digionline.de[62.96.182.24] said: 450 Requested mail action not taken: mailbox unavailable (in reply to RCPT TO command))
Sep 23 08:49:10 monbaca postfix/smtp[21247]: 7BE69435E1: host mi.ruhr-uni-bochum.de[134.147.64.30] said: 450 Requested mail action not taken: mailbox unavailable (in reply to DATA command)
Sep 23 08:49:13 monbaca postfix/smtp[21245]: 7BE69435E1: host mailin-02.mx.aol.com[205.188.103.1] refused to talk to me: 421 Syntax error
Sep 23 08:49:14 monbaca postfix/smtp[21245]: 7BE69435E1: host mailin-01.mx.aol.com[205.188.59.194] refused to talk to me: 421 Syntax error
Sep 23 08:49:18 monbaca postfix/smtp[21245]: 7BE69435E1: host mailin-04.mx.aol.com[205.188.146.194] refused to talk to me: 421 Syntax error
Sep 23 08:49:18 monbaca postfix/smtp[21245]: 7BE69435E1: host mailin-02.mx.aol.com[205.188.190.1] refused to talk to me: 421 Syntax error
Sep 23 08:49:19 monbaca postfix/smtp[21245]: 7BE69435E1: to=<LTDoert@aol.com>, relay=mailin-03.mx.aol.com[205.188.59.193]:25, delay=246255, delays=246246/0.03/9.1/0, dsn=4.0.0, status=deferred (host mailin-03.mx.aol.com[205.188.59.193] refused to talk to me: 421 Syntax error)
Sep 23 08:49:19 monbaca postfix/smtp[21245]: 7BE69435E1: to=<claunieh@aol.com>, relay=mailin-03.mx.aol.com[205.188.59.193]:25, delay=246255, delays=246246/0.03/9.1/0, dsn=4.0.0, status=deferred (host mailin-03.mx.aol.com[205.188.59.193] refused to talk to me: 421 Syntax error)
Sep 23 08:49:19 monbaca postfix/smtp[21245]: 7BE69435E1: to=<liliasch@aol.com>, relay=mailin-03.mx.aol.com[205.188.59.193]:25, delay=246255, delays=246246/0.03/9.1/0, dsn=4.0.0, status=deferred (host mailin-03.mx.aol.com[205.188.59.193] refused to talk to me: 421 Syntax error)
Sep 23 08:49:30 monbaca postfix/smtp[21247]: 7BE69435E1: to=<julia.kothe@rub.de>, relay=mi.ruhr-uni-bochum.de[134.147.64.33]:25, delay=246266, delays=246246/0.05/20/0.1, dsn=4.0.0, status=deferred (host mi.ruhr-uni-bochum.de[134.147.64.33] said: 450 Requested mail action not taken: mailbox unavailable (in reply to DATA command))
Sep 23 08:50:12 monbaca zmmailboxdmgr[22145]: status requested

[soba@ukw.edu.pl]

Probably your address (IP or domain) is blacklisted AOL or AOL servers can't verify your user, who sending messages to AOL (like SPF /callout verification not pass). Please check your MX record (dns), Zimbra postfix restriction and firewall / IDS settings for 25 port.

If you use a DKIM, please check your dns record.
Check also:
Login to your Zimbra host, and:

Telnet to aolMXdomain.com 25
HELO your hostname / FQDN Zimbra domain
MAIL FROM:<youruser@yourdomain>
RCPT TO:<aoluser@aoldomain>
DATA
.


You can also contact with AOL admins.