I have a BT hosted email account xxx@btconnect.com which is accessed via my domain name yyy@companyname.co.uk. I can email most people, but there are some accounts on AOL and Yahoo that I have been emailing for 2 years that have now stopped receiving my emails.
I can email them from my web based access, but not from Outlook. If I send an email to a group of recipients and check it arrives, I can then add one or more of these email addresses and the email is then not delivered to anyone, including myself if I copy my own BT email address.
The email is shown in my Sent Mail folder, but I get no non-delivery note, even if I request a delivery receipt as an email option.
Where are these emails being dropped?
How can they be dropped without a non-delivery report being generated?
How can the addition of "blocked" email addresses prevent the delivery to otherwise working addresses, including delivery back to myself?
