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http://bugs.exim.org/show_bug.cgi?id=1062
--- Comment #17 from Simon Arlott <bugzilla.exim.simon@???> 2011-02-22 21:29:28 ---
(In reply to comment #14)
> Exim needs a real looping structure or al least remove the 20 nested ACL
> restriction.
You can do anything with ${sg...}:
This is a partial extract of an ACL condition used to check all MX hosts in
multiple blacklists:
deny
set acl_m1 = ${lookup dnsdb{>|defer_never,mxh=$sender_address_domain}}
!condition = ${if eq{}{$acl_m1}}
dnslists = <; \
${sg{space separated list of blacklist domains which MUST NOT be empty}{
}{/<|\$acl_m1;}}/<|$acl_m1
message = MX $dnslist_matched for $sender_address_domain is
blacklisted by $dnslist_domain.\n$dnslist_text
log_message = dnslist-mx ($dnslist_matched)\
${map{<,$dnslist_value}{ \
${lookup{$dnslist_domain=$item}lsearch{/etc/exim/conf/blacklists}{$value}{$dnslist_domain/$item}}\
}}
Note: if the inner list expands to "", Exim will check the list "" for the
hostname, which (if it has an A record) is then true. I have a lookup that uses
"localhost" if not found so that the dnslist lookup for "example.com.localhost"
returns NXDOMAIN.
See bug #458 for another example of looping with ${sg...}
(
http://bugs.exim.org/show_bug.cgi?id=458#c16).
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