ISPconfig3 Install: Can send mail but not recieve!?

[SwOsHiE]

Hello everyone!

For the past days I've been trying to solve this problem by searching the forum and the internet but with no results..

My problem is as many others: I can send mail to external adresses but I cannot receive mail locally or externally.

I installed a CentOS ISPconfig3 server from this guide:
http://howtoforge.org/perfect-server...64-ispconfig-3

In the meantime I was writing this post i found an interesting error in my maillog:

Jun 2 23:57:20 aztsv01 amavis[13141]: (13141-05) Passed CLEAN, MYNETS LOCAL [127.0.0.1] [127.0.0.1] <info@example.com> -> <info@example.com>, Message-ID: <fc9d829ffc7f8e638c19495748253213@localhost>, mail_id: vxkvnYcGx-SR, Hits: 1.459, size: 732, queued_as: 2C865E3009D, 269 ms
Jun 2 23:57:20 aztsv01 dovecot: deliver(info@example.com): Module is for different version 1.2.16: /usr/lib/dovecot/lda/lib90_sieve_plugin.so
Jun 2 21:57:20 aztsv01 postfix/smtp[16570]: DAA8EE30013: to=<info@example.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.44, delays=0.07/0/0/0.37, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=13141-05, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 2C865E3009D)
Jun 2 23:57:20 aztsv01 dovecot: deliver(info@example.com): Fatal: Couldn't load required plugins
Jun 2 23:57:20 aztsv01 postfix/qmgr[13100]: DAA8EE30013: removed

I changed the real e-mail adresses, so that is not the problem..

After reading this post:
http://www.howtoforge.com/forums/arc...p/t-52741.html

I found out that you could just disable sieve, but is that not kind of dangerous if you have costumers at that mailserver?

Thanks in advance!

Best regards,
Mattias