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550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)
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Thread: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)

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    Junior Member Nikolas's Avatar
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    550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)

    When accessing outlook for your emails, you might get below error:


    550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)


    The above error suggest that the SMTP authentication is not enabled in your Outlook program, so to enable it follow below settings:


    For Outlook 2000, Go to Tools -> Services (or Tools -> Accounts, if Services is not listed). Select your Internet E-Mail Account and press “Properties.” Go to the “Servers” tab, and check “My server requires authentication” under Outgoing Mail Server. Press “Settings,” select “Use same settings as my incoming mail server,” then press “OK” three times to save the changes & return to Outlook. Finally, restart your mail client.


    For Outlook Express, Go to Tools -> Accounts. Select the “Mail” tab. Select your Email account and press “Properties.” Go to the “Servers” tab, and check “My server requires authentication” under Outgoing Mail Server. Press “Settings,” select “Use same settings as my incoming mail server,” then press “OK” twice times to save the changes, then press “Close” to return to Outlook Express. Finally, restart your mail client.


    Those settings will help you solve that problem.

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    GOZEN (07-06-2014),Manos (06-30-2014)

  3. #2
    GOZEN Customers Manos's Avatar
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    Nice info!
    I think that also applies to Mozilla Thunderbird!

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