My ISP "Comcast" has contacted me saying they believe that I have a virus and that they believe that my computer is being used to send outbound spam email. They have cut off my outbound service until I change my port from 25 to 587 since 25 is the usual port used to control computers sending out spam on someone else's machine. I cannot find where to change this as I know immediately where to do this on other email programs. Please direct me. Thank you.
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