Failure to Deliver Email

Vince — Wed, 23 Jan 2013 11:59:28 GMT

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?

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Failure to Deliver Email