Spam between email of the same domain

[chua_jose]

I have a problem between with mail of user in same domain.
These user they receive as SPAM, mail of other users of the domain.
I have added the name of domain(*@domain.com) to the white list of URIBL, but is there some way of automating it for all the domains?

This is content of email:
3.8 FH_HOST_ALMOST_IP The host almost looks like an IP addr.
3.1 FH_HOST_EQ_DYNAMICIP Host is dynamicip
0.0 HTML_MESSAGE BODY: HTML included in message
1.6 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address
[81.36.77.242 listed in dnsbl.sorbs.net]
0.5 RCVD_IN_PBL RBL: Received via a relay in Spamhaus PBL
[81.36.77.242 listed in zen.spamhaus.org]
0.8 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org
[<http://dsbl.org/listing?81.36.77.242>]
0.1 RDNS_DYNAMIC Delivered to trusted network by host with
dynamic-looking rDNS
0.7 SHORT_HELO_AND_INLINE_IMAGE Short HELO string, with inline image
0.0 DYN_RDNS_SHORT_HELO_IMAGE Short HELO string, dynamic rDNS, inline
image
0.3 DYN_RDNS_SHORT_HELO_HTML Sent by dynamic rDNS, short HELO, and HTML
0.0 DYN_RDNS_AND_INLINE_IMAGE Contains image, and was sent by dynamic
rDNS
I have ip static in my server

Thanks

[falko]

Please do this:
postconf -e 'smtpd_sasl_authenticated_header = yes'
/etc/init.d/postfix restart

[CaptainBalou]

This reduced the spam level from 3.1 to 1.8 in Mails from/to the same domain. Thanks.