SMTP error from remote mail server after end of data ?

vilk

• September 03, 2020 14:58

Hello to all, I just joined again the forum, i was already a member but i had to make a new profile on here! Can anyone help me with this situation? I'm using cpanel Horde and when I send some emails they do not get delivered, if I track the email using the tracking on cpanel i can see this message: SMTP error from remote mail server after end of data: 451 too many messages, slow down. [smtp-14.iol.local; LIB_650] Does this mean that the email will never will be delivered or it will be delivered later on? Why this happen? Thank you !

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  kodeslogic

  • September 04, 2020 20:46

  Such a warning message from the mail delivery system normally includes the information about the number of days it will retry to send an email. [QUOTE]Message will be retried for x more day(s)
  This happens when the recipient server temporarily limit (throttle) the amount of email they accept from a particular sender during a specified period of time.

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  cPanelLauren

  • September 04, 2020 21:57

  This is indeed a result of too many messages being sent to that specific MTA at once from your domain. They need to be throttled as @kodeslogic has noted.

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