On Mon, 21 Jun 2004, Matthew Schumacher wrote:
[SOCKETMAP]
> It allows you to have sendmail connect to a daemon and ask if the email
> address is valid or not.
Actually, it's far more than that. You can implement *any* Sendmail map
with a daemon, including mailertable, access_db, virtusertable, ...
> I'm not sure how mimedefang would use this.... David, what is
> mimedefangs role in this?
MIMEDefang will allow you to define a function called filter_map
that will be called with two arguments: A map name, and a key. It can
then do whatever magic it likes to "look up" the key.
Here's an example I'm working on right now.
Sendmail config file:
V10/Berkeley
Kmysock socket unix:/var/spool/MIMEDefang/map.sock
The MIMEDefang filter:
sub filter_map ($$) {
my($mapname, $key) = @_;
my $ans;
$ans = reverse($key) . " - " . reverse($mapname);
return ("OK", $ans);
}
Results of a sendmail -bt test session:
$ /usr/sbin/sendmail -bt -C ./map.cf
No local mailer defined
ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>
> /map mysock Testing 1 2 3
map_lookup: mysock (Testing 1 2 3) returns 3 2 1 gnitseT - kcosym (0)
Isn't that so cool? :-) I defy anyone to write rules with Sendmail's .cf
language that can reverse a string.
Of course, a non-toy example would do something real, like looking things
up in an LDAP directory or a SQL database.
Regards,
David.
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