No Link Showing In Email?

I am trying to test emails using the local PickupDirectory. The code seems to work only in that an email is send to the local directory, but it appears like this: [URL] ....

Where it says 'Please click....here..', the 'here' should be a link.

This is the code I have:

Code:
Protected Sub SendPost_Click(ByVal sender As Object, e As System.EventArgs) Handles SendPost.Click
Dim SMTPMail As New System.Net.Mail.MailMessage()
Dim sbody As New StringBuilder()
sbody.Append("Please click <a href='http://usingasp.net/reset_pwd.aspx'>here</a> to reset your password")

[Code] ....

How can I rectify that?