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126 lines
4.5 KiB
Plaintext
126 lines
4.5 KiB
Plaintext
# $Id:$
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#
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# list of hosts and domains for whom we relay mail.
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# all .forward hosts, domains must be listed in this file.
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# same for hosts and domains in /etc/aliases
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F{LocalIP}-o /etc/mail/Local-IP
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F{RelayTo}-o /etc/mail/Relay-Hosts
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# database declarations
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Kdenyip hash -o -a.REJECT /etc/mail/denyip.db
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Kfakenames hash -o -a.REJECT /etc/mail/fakenames.db
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Kspamsites hash -o -a.REJECT /etc/mail/spamsites.db
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# helper rulsesets; useful for debugging sendmail configurations
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#
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#
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Scheck_rbl
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# lookup up an ip address in the Realtime Blackhole List.
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R$-.$-.$-.$- $: $(host $4.$3.$2.$1.rbl.maps.vix.com $:OK $)
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Sxlat # for sendmail -bt
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# sendmail treats "$" and "|" as two distinct tokens
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# this rule "pastes" them together into one token
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# and then calls check_relay.
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R$* $$| $* $: $1 $| $2
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R$* $| $* $@ $>check_relay $1 $| $2
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Scheck_relay
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# called with "hostname.tld $| IP address" of connecting host.
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# hostname.tld is the fully-qualified domain name
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# IP address is dotted-quad with surrounding "[]" brackets.
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#
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# each group of rules in this ruleset is independent.
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# each accepts and return "hostname.tld $| IP address"
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# use the ones that you want comment out the rest
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# you may rearrange the groups but not the rules in each group.
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# each group is preceded and followed by a comment
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#
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# host must NOT be in the "spamsites" database--BEGIN
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R$* $| $* $: <$1 $| $2> $1
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R<$*> $+.$+.$+ <$1> $3.$4
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R<$*> $+.$+ $: <$1> $(spamsites $2.$3 $)
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R<$*> $*.REJECT $#error $: 521 blocked. contact postmaster@$m
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R<$*> $* $: $1
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# host must NOT be in the "spamsites" database--END
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# ip address must NOT be in the "denyip" database--BEGIN
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R$* $| $* $: $1 $| $(denyip $2 $)
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R$* $| $*.REJECT $#error $: 521 blocked. contact postmaster@$m
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# ip address must NOT be in the "denyip" database--END
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R$* $@ OK
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Scheck_mail
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# called with envelope sender (everything after ":") in
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# "Mail From: xxx", of SMTP conversation
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# may or may not have "<" ">"
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# the groups of rules in this ruleset ARE NOT independent.
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# "remove all RFC-822 comments" must come first
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# "Connecting Host" and "Paul Vixie's RBL" must be last
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#
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# use the ones that you want comment out the rest
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# each group is preceded and followed by a comment
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#
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# remove all RFC-822 comments--BEGIN
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# MUST be first rule in check_mail rulseset.
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R$* $: $>3 $1
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# remove all RFC-822 comments--END
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# mail must come from a DNS resolvable host--BEGIN
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R$* < @ $+ . > $: $1 @ $2
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R$* < @ $+ > $#error $@ 4.1.8 $: "451 Domain does not resolve"
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# mail must come from a DNS resolvable host--END
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# mail must NOT come from a known source of spam--BEGIN
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R$+ @$+ $: <$1@$2> $2
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R<$*> $+.$+.$+ <$1> $3.$4
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R<$*> $* $: $(spamsites $2 $: OK $)
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R$+.REJECT $#error $@ 5.7.1 $: 550 $1
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R<$*> $* $: $1
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# mail must NOT come from a known source of spam--END
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# Connecting Host must resolve--BEGIN
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R$* $: $1 $: $(dequote "" $&{client_name} $)
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R$* $: $>3 foo@$1
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R<$*> $*<@$*> $#error $@ 4.1.8 $: "451 Domain does not resolve"
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# Connecting Host must resolve--END
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# ip address must NOT be in Paul Vixie's RBL--BEGIN
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R$* $: $1 $: $(dequote "" $&{client_addr} $)
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R$* $: $>check_rbl $1
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R$*.com. $#error $@ 5.7.1 $: "550 Mail refused, see http://maps.vix.com/rbl"
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# ip address must NOT be in Paul Vixie's RBL--END
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R$* $@ OK
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Scheck_rcpt
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# called with envelope recipient (everything after ":") in
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# "Rcpt To: xxx", of SMTP conversation
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# may or may not have "<" ">" and or RFC-822 comments.
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# let ruleset 3 clean this up for us.
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#
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# do NOT reorder these two groups of rules.
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# restrict mail relaying to host and domains listed in /etc/sendmail.cR
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#
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# mail must NOT be addressed "fakenames"--BEGIN
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R$* $: <$1> $>3 $1
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R<$*> $+ < @ $+ > $: <$1> $(fakenames $2 $: OK $)
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R$+.REJECT $#error $@ 5.2.1 $: 550 $1
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R<$*> $* $: $1
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# mail must NOT be addressed "fakenames"--END
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# mail must come from or go to this machine or machines we allow to relay--BEGIN
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# from http://www.informatik.uni-kiel.de/%7Eca/email/check.html#check_rcpt
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R$+ $: $(dequote "" $&{client_addr} $) $| $1
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R0 $| $* $@ ok
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R$={LocalIP}$* $| $* $@ ok
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# not local, check rcpt
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R$* $| $* $: $>3 $2
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# remove local part, maybe repeatedly
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R$+ $:$>removelocal $1
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# still something left?
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R$*<@$+>$* $#error $@ 5.7.1 $: 550 we do not relay
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#
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Sremovelocal
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# remove RelayTo part (maybe repeatedly)
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# R$*<@$*$={RelayTo}.>$* $>3 $1 $4
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R$*<@$=w.>$* $: $>removelocal $>3 $1 $3
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R$*<@$*>$* $@ $1<@$2>$3
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# dequote local part
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R$- $: $>3 $(dequote $1 $)
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R$*<@$*>$* $: $>removelocal $1<@$2>$3
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# mail must come from or go to this machine or machines we allow to relay--END
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