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Email server problem - 451 Temporary local problem - please try later

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1 comment

  • cPanelMichael
    Hello :) The remote mail server is rejecting the message with the following error: [QUOTE]503 Valid RCPT command must precede DATA
    Do you have SMTP authentication enabled in the email client used to send this email? Is the domain name you are sending from in the /etc/localdomains file on the cPanel server? Thank you.
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