451 Invalid Smtp line - Should end with CRLF

Discussion in 'Mail Server Support' started by popowich, Jan 15, 2011.

  1. popowich

    popowich EQ Forum Admin Staff Member

    Aug 12, 2008
    Likes Received:
    If you are receiving an error similar to the above it is becuase you are trying to send email through or to a mail server that is enforcing some fairly strict email related RFC standards (rules) in their email checks.

    The best thing to do is fix the program or software that you are using to send your email.

    If that doesn't work you can try contacting your ISP but if the check is enabled then they are probably of the mindset that will result in the response "fix the software that you are using to send email".

    If you administer a qmail based mail server and want to fix the problem on your end, and are looking for more information, here is what you are looking for :



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