@20thCMan wrote:
Help gratefully received!
I must admit that I am not at all sure what's going on there 🤔
Generally speaking "550 5.7.1 Relaying denied" type error messages are non delivery messages sent just once rather than being resent periodically.
However, a quick internet search reveals that iomart ( https://www.iomart.com/ a Scottish information technology company) do have a "Mail Filtering " product that offers protection against malicious threats. So presumably your contact, or their IT provider, uses that product and it has blocked your email but I am not sure why it would keep resending the message.
So the simple answer is that you need to ask them why that is happening.
However, I suspect there is a back story to this error that we are not being told which might give some context and provide an explanation as to why the email is being blocked. 😉
Did the original email you sent have a Virgin Media email address (so virginmedia.com, ntlworld.com, blueyonder.co.uk or virgin.net) and was the email sent via a Virgin Media SMTP server?
Or was it a Virgin Media email sent via an SMTP server controlled by another organisation? The name of the SMTP server will be listed in the email account settings of the email client or app that you use to manage your emails.
Or did the email have a non VM domain name address, possibly a private a domain name, and if so whose SMTP server were you using as the sending server?
Also, a bit more of the contents of the error message might be useful but with the name part of the address (the part before @ symbol ) of any email address redacted.
Coenoby
I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more
Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks