It is clear that some sort of problem exists if you (as a TT account) send mail to a blueyonder user in the Bristol area?
The question mark appears because both the blueyonder users who have not received mail from me recently have 'questionable' set ups on their PC's - so you will appreciate the duality that could exist. Is there a known problem with TT/Blueyonder at the moment? Your experiances/thoughts would be appreciated.
Are the recipients using a mail client (Outlook or Thunderbird for instance) or are they accessing their mail in a web browser?
If your mail is being received by others, and only those using Blueyonder in the Bristol area are having issues receiving it, then it would suggest the issue is probably 'their end' of the connection...