This requires another android application that is not free titled Email Me Pro . The cost is $2.
Once installed you must open up Email Me Pro and enter your email settings and enable the send email automatically option.
Then from within Tasker you can find the E-Mail Me Pro Task under the "Plug-Ins" section. from there you just enter the e-mail address you'd like to e-mail to be sent to, the subject, and the message.