smtp; 553 sorry, invalid HELO hostname (#5.7.1)

ltoso

• January 04, 2016 07:19

Hi, my email server is sending emails to gmail, yahoo and other free email service providers but when i send email to rediffmail.com it gives the following error smtp; 553 sorry, invalid HELO hostname (#5.7.1) after looking at the internet for solution it says that this type of error comes when the hostname set inside cpanel doesn't lead to an ip address or is not FQDN but in my case i have checked the hostname and checked if my hostname leads to an ip address on pinging it does Please recommend

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  cPanelMichael

  • January 04, 2016 19:37

  Hello :) Could you let us know the specific output from /var/log/exim_mainlog when this happens? EX:
  exigrep user@external-domain /var/log/exim_mainlog
  Thank you.

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  ltoso

  • January 07, 2016 17:53

  Hi, following is the output of the above command, i have just replaced my sending email id with demo.value@ourownserver.com[/EMAIL] and rediff email id to demo.value@rediffmail.com[/EMAIL] and the ip from which i am sending to xxx.xxx.xxx.xxx to keep my info private
  2016-01-04 05:34:06 1aG1ee-000383-SW ** demo.value@rediffmail.com R=dkim_loo kuphost T=dkim_remote_smtp H=mx.rediffmail.rediff.akadns.net [202.137.234.30] X= TLSv1:DHE-RSA-AES256-SHA:256 CV=no: SMTP error from remote mail server after RCP T TO:: 553 sorry, invalid HELO hostname (#5.7.1) 2016-01-04 05:34:06 1aG1ee-000383-SW Completed
  

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  cPanelMichael

  • February 02, 2016 21:07

  You may need to consult with the administrator of this particular remote mail server and ask them to provide you with the specific reason your message has been rejected. As far as general advice, this document is helpful: How to Keep your Email out of the Spam Folder - cPanel Knowledge Base - cPanel Documentation Thank you.

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