Our email an ntlworld.com account and is working normally and I can send to anywhere, except to other ntlworld.com accounts. Every time we try to send to an ntlworld.com account it gets rejected as spam with the following message:
This is the mail system at host know-smtprelay-10-imp.
I am sorry to have to inform you that your message, "Test", could not be delivered to firstname.lastname@example.org.
The remote mail system said; 554:5.2.0 778t1u01H1d4WkY0178zCz Spam content found
The original message is attached.
I have tried to contact VM via online chat and the phone but I could die of old age waitig for them so have given up and tried here. Any advice would be greatly appreciated.