Email Bounces from nhs.net email address from personal mail accounts but all is fine from Campaign scheduler.

As above, get we bounced emails from nhs.net email addresses from our personal or alias email accounts, even when directly replying to their incoming mail.

All other emails are not bouncing. We have send a campaign to nhs.net accounts and no bounce backs.

Here is an example of the mail bounce. This is giving our business a very unprofessional look as we cannot even reply to their emails. They are all the same!!

I hope you can help.

Many Thanks

Undelivered Mail Returned to Sender

mailer-daemon@mail.zoho.eu

1:18 PMINBOX

experience

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.

example@nhs.net, ERROR CODE :554 - 5.7.1 <example@nhs.net>: Recipient address rejected: ERS-QIL.

Reporting-MTA: dns; mx.zohomail.eu
Arrival-Date: Thu, 15 Sep 2022 13:18:45 +0100

Original-Recipient: rfc822; example@nhs.net
Final-Recipient: rfc822; example@nhs.net
Status: 554
Action: failed
Last-Attempt-Date: 15 Sep 2022 12:18:48 GMT
Diagnostic-Code: 5.7.1 <example@nhs.net>: Recipient address rejected: ERS-QIL.

Received:from mail.zoho.eu by mx.zoho.eu
with SMTP id 1663244325145289.7342162234438; Thu, 15 Sep 2022 14:18:45 +0200 (CEST)
Message-ID:<1834116510e.f44f40021892.105678860884653411@avatarjo.com>
Date:Thu, 15 Sep 2022 13:18:45 +0100
From:AvatarJo Experience Team <experience@avatarjo.com>
To:"HIDDEN FOR PRIVACY REASONS"
<example@nhs.net>
Subject:Re: Website Enquiry - Account Support Request
Content-Type:multipart/alternative;
boundary="----=_Part_5957_1326725673.1663244325134"
User-Agent:Zoho Mail