I have several old and outdated e-mail addresses that pop up like an autofill when I am addressing an e-mail.  These are not in my contact list but they must be in a memory of some sort.  I would like to remove some of these but cannot find information on how to do this.  For example:

New (Message startup)

To: <removed by the moderator> - this is the one I want, but I will get others as well

      <removed by the moderator>

      <removed by the moderator>

I sometimes e-mail myself a reminder about something from home to my workplace and it is annoying to have other former e-mail addresses automatically pop up in there.  I have accidentally e-mailed myself to the e-mail at former jobs.  EEEK!