I have been sending e-mails (Bcc) to a small number of committee members for over a year without any problems. About a week ago I started to get delivery failure notices for Btinternet addresses only. I am using Live Mail 2012 with Windows 8. The failures only apply to Btinternet addresses sent as Bcc and do not occur using webmail. Direct mailing (not Bcc) is OK either way.

Strangely, there is always about 24 hours delay between sending and receiving the failure notice. My service provider is not BT.

Thanks TonySSD