- Removed the shut down DSBL blocklists (#2796734).
- Fixed broken RFC1918 reference in contrib/.htaccess and doc/.htaccess (#2798839).
- Stop using deprecated ereg functions. (#2820952)
+ - Remove personal data from Message ID seed. (#880029/847107)
+ - Implemented page referal verification mechanism. (Secunia Advisory SA34627)
+ - Implemented security token system. (Secunia Advisory SA34627)
+ - Fix issue with multi-part related messages not showing all attachments (#2830140).
+ - Fix for security token missing in newmail plugin (#2919418).
+ - Fix for mailto: urls containing + characters, thanks to Michael Puls II for the
+ patch.
+ - Make base URL autodetection more robust; fixes some lighttpd issues
+ (probably #1741469).
+ - Encoded From headers now properly quoted (#2830141).
+ - Multibyte strings (notably subjects) are now handled correctly (#2824813,
+ #2925731).
+ - X-DNS-Prefetch-Control: off header is now sent to browsers to prevent information
+ leakage when Firefox does DNS prefetching for URLs contained in emails.
+ - Added the ability to configure Google Mail (Gmail) as the mail server
+ behind SquirrelMail.
+ - Explicitly disable caching for left_main and right_main pages (#2983134).
+ - Fix error with SpamCop reporting plugin not being able to send report as
+ emails (#1795310).
+ - Fix typo in SpamCop plugin.
Version 1.5.1 (branched on 2006-02-12)
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