# blacklist_helo - after permit_sasl, used to stop common spammers/misconfigurations
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#
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# probably just put REJECT lines in here,
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# as OK lines will bypass a lot of other checks you may want done
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# (use DUNNO instead of OK)
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#
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# common for spammers (check https://data.iana.org/TLD/tlds-alpha-by-domain.txt and remove valid tld's occasionally)
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/.*\.administrator$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.admin$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.adsl$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.arpa$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.bac$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.coma$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.dhcp$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.dlink$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.dns$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.domain$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.dynamic$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.dyndns\.org$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.dyn$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.firewall$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.gateway$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.home$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.internal$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.intern$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.janak$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.kornet$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.lab$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.lan$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.localdomain$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.localhost$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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# .local is used by spammers a lot, but too many otherwise legit servers hit it
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# (instead of REJECT, should send to greylisting)
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#/.*\.local$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.loc$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.lokal$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.mail$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.nat$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.netzwerk$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.pc$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.privat$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.private$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.router$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.setup$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.119$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.beeline$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.cici$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.gt_3g$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.gt-3g$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.hananet$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.skbroadband$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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/.*\.tbroad$/ REJECT HELO hostname is using a top level domain that does not exist. See RFC 2821 section 3.6.
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