Search Engine: Elastic

Article ID: 127094, created on Oct 6, 2015, last review on Oct 6, 2015

  • Applies to:
  • H-Sphere 3.6.3


Message cannot be delivered with the following error message:

553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1)

Mail relay is enabled for the affected domains.

Or Mail relay server has been recreated anew after disaster and all domains are affected.


Re-enable mail relay in customers' Control Panel.

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