Re: aklug Digest V5 #90

Care to share this stuff with other milter users? :)

Mike B.
>
> Date: Wed, 17 May 2006 14:02:50 -0800
> From: Matthew Schumacher <schu@schu.net>
> Subject: Postfix now has support for sendmail's milter protocol.
>
>> From the postfix mailing list:
> X-Bogosity: No, tests=bogofilter, spamicity=0.001616, version=0.92.8
>
> http://archives.neohapsis.com/archives/postfix/2006-05/0750.html
>
> For those of you who don't know what milter is and why it's the greatest
> thing since sliced bread take a look at the docs:
>
> http://www.milter.org/milter_api/index.html
>
> Also here is a link to a fantastic milter called mimdefang:
>
> http://www.mimedefang.org
>
> Mimedefang is a milter that keeps a pool of perl children around to
> filter email. Since this pool is always running there is virtually no
> performance hit for filtering the message unless your waiting for ldap,
> spamassassin, or some other external filters that mimedefang can call.
>
> Here is a quick example of how powerful this is:
>
> This filter_recipient function in mimedefang:
> =========================================================================
>
> sub filter_recipient {
>
> # set vals
> my ($recipient, $sender, $ip, $hostname, $first, $helo, $rcpt_mailer,
> $rcpt_host, $rcpt_addr) = @_;
>
> # if the user is sending email to a list then check for auth
> if( $sender !~ /.+\.net$/ ){
> return ('REJECT', 'Sorry, sender must come from a .net domain.');
> }
> }
>
> =========================================================================
>
> Washes the $sender though a quick regex, and rejects if the sender
> doesn't end with .net:
>
> =========================================================================
> 220 testserver ESMTP Sendmail 8.13.6/8.13.6; Wed, 17 May 2006 13:48:20 -0800
> helo fred.com
> 250 pleased to meet you
> mail from: fred@fred.com
> 250 2.1.0 fred@fred.com... Sender ok
> rcpt to: user@domain.net
> 554 5.7.1 Sorry, sender must come from a .net domain.
> quit
> =========================================================================
>
> As you can see, the ability of the mail system to call an external
> filter via socket during the SMTP transaction, combined with a good
> milter that lets you do things in perl, pretty much results in endless
> flexibility. On one mail system I manage, I have mimedefang stripping
> out winmail.dat attachments and re-attaching them with mime. Now I can
> get attachments from outlook users. YAY!!!
>
> schu
>

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.

----- End forwarded message -----

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.

---------
To unsubscribe, send email to <aklug-request@aklug.org>
with 'unsubscribe' in the message body.
Received on Wed May 17 14:49:53 2006