OK. I'm still dead in the water. I've contacted all the suggested (outsourced) advise so far and presented the same question. At least Declude is consistent ensuring me that "they don't bounce mail" that I have to get in touch with the refusing ISP. In our example I don't know how to get in touch with yahoo.
It is possible that someone in one of the other forum's I outsourced will eventually define the X-RBL: warnings that suggest SPAMHEADER & CMDSPACE problems 'I must be transmitting' will still respond. Patience.
I still think it's my fault whether it is originating in MS Office\Outlook or just Word. I've removed & reinstalled Office as I mentioned earlier. I never mentioned before in this thread that I have a couple of other anomalies with my email editor having to do with font sizing and copy & paste.
Once I was in Outlook Help and clicked 'Detect & repair' and found that the process began what looked like a re-installation of Outlook. I lost all my files (I don't know about setup and properties). I lost all my folders and mail. I used Sys Restore and am nowhere new.
MS Word help has the same option to D & R, I don't know what will happen to all my folders and files either if I chose that help option.
What exactly is 'Detect & Repair' in the MS Office and Outlook help menu? I know if you want something in a PC you'd better have saved it before you make any changes just to be sure.
Is MS Office is damaged?
If so, can I use/install 'OpenOffice.org and keep all of MS Office saved data and then remove Office later?
And finally remember, my mail to my trusted friends doesn't get returned to me when I use a pseudonym hotmail account.