Strip KMail specific header fields when sending mail (just to be safe).
Strip KMail specific header fields when sending mail (just to be safe).

svn path=/trunk/kdenetwork/kmail/; revision=48629

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi