SA and Blackberry

[Dhawal Doshy <dh...@netmagicsolutions.com>]

Hello List,

Here is a sample mail sent from a blackberry device.

===========
Received: from smtp01.bis.eu.blackberry.com 
(smtp01.bis.eu.blackberry.com [216.9.253.48])
	by mx1.netmagicians.com (Postfix) with ESMTP id 6D9D8CC70C
	for <re...@anotherdomain.tld>; Tue, 12 Dec 2006 20:18:13 +0530 (IST)
Message-ID: 
<85...@bxe032-cell00.bisx.produk.on.blackberry>
Reply-To: sender@domain.tld
Sensitivity: Normal
Importance: Normal
To: recipient@anotherdomain.tld
Subject: Test mail
From: "=?UTF-8?B?U2hyaXJhbmdhIE11bGF5?=" <se...@domain.tld>
Date: Tue, 12 Dec 2006 14:48:01 +0000
Content-type: text/plain
MIME-Version: 1.0
X-NetMagic-MailScanner-SpamCheck: not spam, SpamAssassin (not cached,
	score=-1.3, required 5, BAYES_00 -2.60, BOTNET_SERVERWORDS -0.01,
	FROM_EXCESS_BASE64 1.31)

Test mail from blackberry
===========

Every mail hits the 'FROM_EXCESS_BASE64' rule, with some hitting these 
as well.
MIME_BASE64_BLANKS
MIME_BASE64_NO_NAME
MIME_BASE64_TEXT

A search on google and the sa-list doesn't get you much except a post by 
dallas: http://www.nabble.com/Blackberry-changes--p3502033.html and 
another thread "Scoring base64 blob messages". The blackberry public KB 
doesn't yield anything at all.

Now i am sure a lot of you deal with Blackberry users.. any 
recommendations on reducing the total score for such users? I could 
reduce the score for these rules in particular OR use 
whitelist_from_rcvd but that would be a less preferred option.

Also not relevant, but i had to temporarily include the blackberry 
servers in my SPF record to resolve SPF_SOFTFAIL issues.

- dhawal