Webmailer is a preference pane for setting mailto: parameters in OS X. Ever click on a mailto: link, only to scream in frustration as Apple Mail opens yet again? The curse of the webmail user is that there is no way to get around this problem. That is, until now. Webmailer is an unoriginally named program (actually a preference pane) for Mac OS X that allows you to fix this problem. You can set it to open any URL or run any shell script, complete with the parameters lifted from the mailto link. Webmailer comes with links for several possible webmail sites, including Yahoo! Mail, Gmail, Hotmail, and several webmail programs, such as SquirrelMail or Roundcube. But you can always add your own configuration.
What's new in Webmailer
In addition to always using your default browser, Webmailer can now always use a non-default browser to handle your webmail, even if it isn't open.
Basic AppleScript support: set active destination to destination "Apple Mail"
Webmailer can now export and import its settings, in order to make migration to a new user account easier. (Apple's Migration Assistant tool should continue to include Webmailer's settings as well.)
Bug fix: Shell script actions were not being recognized by newer C shells.
Bug fix: Header fields were being matched by placeholders whose names were suffixes (i.e. [bar] would match foobar=baz).