Hi there...
I have been running windows mail servers for a few years. This is my first Linux mail server.. currently running 6.0 GA on Ubuntu 804lts. 32bit.
I have found these DNSBL Lists to work VERY well..
zen.spamhaus.org
bl.spamcop.net
dnsbl-1.uceprotect.net
ix.dnsbl.manitu.net
dyna.spamrats.com
noptr.spamrats.com
all.rbl.jp
safe.dnsbl.sorbs.net
b.barracudacentral.org
psbl.surriel.com
dnsbl.ahbl.org
dnsbl.njabl.org
bhnc.njabl.org
dnsbl.dronebl.org
ubl.unsubscore.com
Please feel free to check statistics with low false postivies from these sites.
DNS Black list compared - look up dnsbl performance info
Blacklists Compared, 22-Aug-09
and
DNSBL Resource: Statistics Center
I did not include spamhaus below as i have it running at the firewall..on another box
FYI..
Do not use DSBL = offline
Use only Zen for Spamhaus
CBL is included in Zen, so no need to use it by itself.
I added these rules by doing this...
zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl-1.uceprotect.net"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client ix.dnsbl.manitu.net"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client dyna.spamrats.com"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client noptr.spamrats.com"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client all.rbl.jp"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client safe.dnsbl.sorbs.net"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client b.barracudacentral.org"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client psb.surriel.com"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl.ahbl.org"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl.njabl.org"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client bhnc.njabl.org"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl.dronebl.org"
zmprov mcf +zimbraMtaRestriction "reject_rbl_client ubl.unsubscore.com"
verify rules added
zmprov gacf | grep zimbraMtaRestriction
then use
zmmtactl restart
Cheers!