"(?:SeaMonkey|Iceape)(?:\/(\\d+[\\.\\d]+))?|DAVdroid(?:\/(\\d+[\\.\\d]+))?|The Bat!(?: Voyager)?(?:[\/ ](\\d+[\\.\\d]+))?|MailBar(?:[\/ ](\\d+[\\.\\d]+))?|Postbox(?:[\/ ](\\d+[\\.\\d]+))?|Barca(?:Pro)?(?:[\/ ](\\d+[\\.\\d]+))?|Lotus-Notes(?:\/(\\d+[\\.\\d]+))?|Airmail(?: (\\d+[\\.\\d]+))?|(?:Thunderbird|Icedove|Shredder)(?:\/(\\d+[\\.\\d]+))?|Microsoft Outlook(?:[\/ ](\\d+[\\.\\d]+))?|Outlook-Express(?:\/(\\d+[\\.\\d]+))?"