MSOutlook by choice but that is not free. Of the free ones I think Claws Mail or eMclient are preferable to Thunderbird which I find has a quirky interface. Try them all and see which suits you.
Thanks for the messages sent over to me.
I'm out of the office now but my colleague @JohnC2 is on the boards this evening.
Can I ask if you have messaged but not included the yahoo.com id can you pm him.
If you are experiencing this issue and haven't pm'ed yet please send a private message to johnc2 with both the @btinternet.com and @yahoo id's and he will add them to the case. If anyone has a screenshot they can pm showing the issue that would also be great.
Is there any update on this, just had pointless online chat and phone call with BT, they state unaware of envy issues. Still have a primary email address never heard off and emails rejecting.