Hello vitamin, Thanks a lot for your kind patience! so, I saved Code: [HKEY_CURRENT_USER\Software\Wine\WineBrowser] Browsers="seamonkey" Mailers="seamonkey" as 'seamonkey.reg' and imported it into the registry. Then, I couldn't find this modification in the registry: just the entry 'winebrowser'. So I changed this to: Code: [HKEY_CURRENT_USER\Software\Wine\WineBrowser] "Browsers"="seamonkey" "Mailers"="seamonkey -mail" (is it wright?) The fact remains that now, links as 'http://www.xxx.com/index htm(l)' (it was already the case before modifying the registry) as well as 'http://www.xxx.com' or 'http://www.xxx.com/stuf.php' are opened in my seamonkey browser (it was not the case before modifying the registry). But concerning emails, problem stays: nothing happens... Something strange, my xerrs.log says: > wine: cannot find L"C:\\windows\\system32\\www.xxx.com" (though, as said above, it runs quite well!) > wine: cannot find L"C:\\windows\\system32\\mailto:xxx@xxxxxx" No error mentioned about (for example this topic!) => 'http://forum.winehq.org/viewtopic.php?t=8600' which is opened in seamonkey... Regards. :D :(