Wikimedia Bugzilla is closed!

The email sent by MediaWiki containing a new password has some additional 
carriage return characters in some header lines. Due to this, some email 
clients (e.g. Outlook Express...) display part of the mail header in the body 
of the mail, resulting in a missing 'From:' and missing charset declaration.

The problem can be fixed by removing four '\r' characters in 
includes/UserMailer.php, function userMailer(), lines 46ff:

New version:
		$headers =
			"MIME-Version: 1.0\n" .
			"Content-type: text/plain; charset={$wgOutputEncoding}
\n" .
			"Content-transfer-encoding: 8bit\n" .
			"From: {$from}\n" .
			"X-Mailer: MediaWiki interuser e-mailer";

Existing version (V1.3.7/1.3.8):
		$headers =
			"MIME-Version: 1.0\r\n" .
			"Content-type: text/plain; charset={$wgOutputEncoding}
\r\n" .
			"Content-transfer-encoding: 8bit\r\n" .
			"From: {$from}\r\n" .
			"X-Mailer: MediaWiki interuser e-mailer";

The change was tested on a Debian sarge system and fixed the problem.