What Am I to Make Of This Email 'Send' Conundrum?

[BLUE SKY THINKER]

SD.....

Thanks for suggestion, but little improvement.

That said, ThunderbirdPortable using HTML with no problem. In fact still no problem one hundred per cent of the time with this program; almost dead opposite with Outlook.

As before, very bizarre this discrepency from same laptop/IP address/third partry e-mail host.

Thanks again.