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Can receive email using Outlook Exress but cannot send.

    Question

  • My OS is XP; I can receive e-mails on Outlook Express but cannot send.  I keep receiving the following Error message:

    The message could not be sent because the server rejected the sender's e-mail address.  The sender's email address was "xxxxxxxx@gmail.com".  Subject 'Emailing: xxxxxxxx'. Account: 'pop.gmail.com', Server: 'smtp.gmail.com', Protocol: SMTP, Server Response: '530 5.7.0. Must issue a STARTTLS command first.  oo6sm2468793pbc.22', Port 25, Secure(SSL); No, Server Error: 530, Error Number: 0x800CCC78

    How can I fix this?
    Thursday, July 12, 2012 2:38 PM