[exim-dev] regex iteration

Hi !!

I'm thinking about adding a new function to exim that given a
string, a regexp and one acl name will call the acl as many times
as the regexp is found in the string setting a special variable
with the matched string, something like:

${acl_match {regexp}{string}{acl_name}}

this will return true if all the calls to acl return accept,
false if any call to the acl returns deny or it will defer if
any call to the acl returns defer.

It could be useful to check all ip's in the headers, to check
url's in message body or to do some other kinds of 'iteration', ie:

deny condition = ${acl_match {\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]}\
         {$message_headers}{acl_check_ip}}
      message   = Message passed through blacklisted ip

and then

acl_check_ip:

    deny    dnslists = virbl.dnsbl.bit.nl2/$matched_string
    accept

--
Thanx & best regards ...

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