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    Here are a few simple steps that should help resolve the exchange 0x800ccc79 issue.

    I have a problem with all authentications from Outlook Express to Exchange 2003 SMTP server.

    When I try to send an Outlook Express email from a client connected to the same LAN as mail server n, I can only send email using the mail server’s local IP address. If I specify an SMTP server as the Exchange server’s most public address, I can only send messages to the mailboxes that I specify.They are on the same mail server.

    0x800ccc79 exchange

    When I send an absolute email to an external email list, I only get this error:

    Unable to send message there. Uno dei destinatari is not for è stato accettato dal server. Email without registration è Href=”mailto:[email protected][email protected]“. Protocol ‘ccccc’, Account: ‘xxx’, Server: ‘my public IP address’, Protocol: SMTP, Server response: ‘550 5.7.1 Forwarding failed for 0x800ccc79 Intercambio
    0x800ccc79 Austausch
    0x800ccc79 Troca
    0x800ccc79 Scambio
    Echange 0x800ccc79
    0x800ccc79 교환
    0x800ccc79 Uitwisseling
    0x800ccc79 Utbyte
    Wymiana 0x800ccc79

    544 Post

    Roderick Silva