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Knowledgebase: Mail
When trying to send mail, the client receives the "Access denied - Invalid HELO name (See RFC2821 4.1.1.1)" Error
Posted by Arvand Sabetian (Import) on 07 December 2009 02:36 PM
This error:

Access denied - Invalid HELO name (See RFC2821 4.1.1.1)

Is often caused by not having SMTP Authentication turned on. Please make sure that you have SMTP Authentication turned on in your email client and try sending the email again.

(132 vote(s))
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Comments (2)
James V Magnuson
26 July 2014 08:14 AM
Can you improve this answer by being more specific about the smtp authentication settings. It would also help to provide information according to email client. I am having problems with Thunderbird under Windows 7.
Michael Carr
06 August 2014 09:35 AM
Please see the following article for specifics on setting up and email account, This article is only intended for the specific error listed.

http://blog.arvixe.com/setting-up-your-pop3imap-email-account/
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