The Collaborative International Dictionary of English v.0.48:

E-mail \E-mail\, email \email\, e-mail \e-mail\v. t. [imp. & p.
   p. E-mailed; p. pr. & vb. n. E-mailing.]
   to send (an e-mail message) to someone; as, I emailed the
   article to the editor; she emailed me her report.

   Syn: mail electronically.
        [WordNet 1.5]