I don't know what would have changed to affect the SMTP server or settings and it is affecting only the one computer. It worked one day and not the next. I have found out my backups didn't backup all changes. I went to grab a file off the backup drive and the folder was last updated in September, and missed a file I added last week. This despite that I have backups running daily. I'll be pulling the drive and putting it in this computer after all. Pretty much a tech wreck week. Spectrum was out for me this morning, again. Now despite paying for it, I am happy I have the fiber feed from ATT now also.