postfwd/etc/postfwd.cf.sample

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###################################################################################################
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##
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## ATTENTION: Do NOT use this configuration without your own customizations!
## Please see the manual ('postfwd -m') for more information.
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##
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###################################################################################################
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##
## Definitions
##
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# Greylisting with postgrey @ 127.0.0.1:10031
&&GREYLIST { \
action=ask(127.0.0.1:10031); \
};
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# Maintenance times
&&MAINTENANCE { \
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date=15.01.2007 - 15.01.2007 ; \
date=15.04.2007 - 15.04.2007 ; \
date=15.07.2007 - 15.07.2007 ; \
date=15.10.2007 - 15.10.2007 ; \
time=03:00:00 - 04:00:00 ; \
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};
# Whitelists
&&TRUSTED_NETS { \
client_address=192.168.1.0/22 ; \
client_address=172.16.128.32/27 ; \
};
&&TRUSTED_HOSTS { \
client_name~=\.domain1\.net$ ; \
client_name~=\.domain2\.de$ ; \
};
&&TRUSTED_USERS { \
sasl_username==bob ; \
sasl_username==alice ; \
};
&&TRUSTED_TLS { \
ccert_fingerprint==11:22:33:44:55:66:AA:BB:CC:DD:EE:FF ; \
ccert_fingerprint==AA:BB:CC:DD:EE:FF:11:22:33:44:55:66 ; \
encryption_keysize>=64 ; \
};
&&FREEMAIL { \
client_name~=\.gmx\.net$ ; \
client_name~=\.web\.de$ ; \
client_name~=\.(aol|yahoo|h(ush|ot)mail)\.com$ ; \
};
&&STATIC { \
# contains freemailers
&&FREEMAIL ; \
client_name~=[\.\-]static[[\.\-] ; \
client_name~=^(mail|smtp|mout|mx)[\-]*[0-9]*\. ; \
};
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&&DNSWLS { \
rbl=list.dnswl.org ; \
rbl=exemptions.ahbl.org ; \
rbl=query.bondedsender.org ; \
rbl=hostkarma.junkemailfilter.com/^127\.0\.0\.1$/3600 ; \
rhsbl_client=hostkarma.junkemailfilter.com/^127\.0\.0\.1$/3600 ; \
};
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# Spamchecks
&&BADHELO { \
client_name==!!($$(helo_name)) ; \
};
&&DYNAMIC { \
client_name==unknown ; \
client_name~=(\-.+){4} ; \
client_name~=\d{5} ; \
client_name~=[_\.\-]([axt]{0,1}dsl|br(e|oa)dband|ppp|pppoe|dynamic|dynip|ADSL|dial(up|in)|pool|dhcp|leased)[_\.\-] ; \
};
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&&DNSBLS { \
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rbl=zen.spamhaus.org ; \
rbl=list.dsbl.org ; \
rbl=bl.spamcop.net ; \
rbl=dnsbl.sorbs.net ; \
rbl=ix.dnsbl.manitu.net ; \
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rhsbl=rddn.dnsbl.net.au ; \
rhsbl=rhsbl.ahbl.org ; \
rhsbl=rhsbl.sorbs.net ; \
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};
##
## Ruleset
##
# temporary reject and drop connection during maintenance window
id=M_001 ; &&MAINTENANCE ; action=421 maintenance - please try again later
# stress-friendly behaviour (will not match on postfix version pre 2.5)
id=STRESS ; stress==yes ; action=dunno
# Whitelists
id=WL_001 ; &&TRUSTED_NETS ; action=dunno
id=WL_002 ; &&TRUSTED_HOSTS ; action=dunno
id=WL_003 ; &&TRUSTED_USERS ; action=dunno
id=WL_004 ; &&TRUSTED_TLS ; action=dunno
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# DNSWL checks - lookup
id=RWL_001 ; &&DNSWLS ; rhsblcount=all ; rblcount=all ; \
action=set(HIT_dnswls=$$rhsblcount,HIT_dnswls+=$$rblcount,DSWL_text=$$dnsbltext)
# DNSWL - whitelisting
id=RWL_002 ; HIT_dnswls>=2 ; action=PREPEND X-PFW-STATE: INFO: [$$DSWL_text]
id=RWL_003 ; HIT_dnswls>=1 ; action=PREPEND X-PFW-STATE: INFO: [$$DSWL_text] ; &&STATIC
id=RWL_004 ; HIT_dnswls>=1 ; action=PREPEND X-PFW-STATE: INFO: [$$DSWL_text] ; $$client_name~=$$(sender_domain)$
# DNSBL checks - lookup
id=RBL_001 ; &&DNSBLS ; rhsblcount=all ; rblcount=all ; \
action=set(HIT_dnsbls=$$rhsblcount,HIT_dnsbls+=$$rblcount,DSBL_text=$$dnsbltext)
# DNSBL checks - evaluation
id=RBL_002 ; HIT_dnsbls>=2 ; action=554 5.7.1 blocked using $$DSBL_count dnsbls, INFO: [$$DSBL_text]
id=RBL_003 ; HIT_dnsbls>=1 ; &&DYNAMIC ; action=REJECT listed on dnsbl and $$client_name looks like dynip, INFO: [$$DSBL_text]
id=RBL_004 ; HIT_dnsbls>=1 ; &&BADHELO ; action=REJECT listed on dnsbl and $$helo_name does not match $$client_name, INFO: [$$DSBL_text]
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# Rate limits
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id=RATE_001 ; HIT_dnsbls>=1; \
action=rate($$client_address/1/300/450 4.7.1 please do not try more than once per 5 minutes)
id=RATE_002 ; &&DYNAMIC ; \
action=rate($$client_address/1/300/450 4.7.1 please do not try more than once per 5 minutes)
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# Selective greylisting
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id=GREY_001 ; action=dunno ; &&STATIC
id=GREY_002 ; action=dunno ; $$client_name~=$$(sender_domain)$
id=GREY_003 ; action=dunno ; HIT_dnswls>=1
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id=GREY_004 ; action=&&GREYLIST ; &&DYNAMIC
id=GREY_005 ; action=&&GREYLIST ; HIT_dnsbls>=1
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# Greylisting should be safe during out-of-office times
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id=GREY_006 ; action=&&GREYLIST ; days=Sat-Sun
id=GREY_007 ; action=&&GREYLIST ; days=Mon-Fri ; time=!!06:00:00-20:00:00
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