Hi email from domain name writingonthewall.org.uk is being blocked by domain thewo.org.uk.
No problem sending email elsewhere.
SPF, DKIM & DMARC records set up for the domain name.
Can you please advise.
From: Mail Delivery System
Sent: 16 April 2019 13:38
Subject: Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
host d206469.a.ess.uk.barracudanetworks.com [184.108.40.206]
SMTP error from remote mail server after end of data:
550 permanent failure for one or more recipients