K-9 and Android Thunderbird can't send webhosted email to another domain

So the problem is with site5.com, correct? (and not the ultimate destination of the email which in my tests is a gmail.com server).

If that is true, site5.com is not a full service email site. I started with IXWebHosting, which got bought by site5, and suddenly I had to learn about cPanel when I never did before. Since site5 has been “working” on my case for days (over a week if I count the time to get it to the internal “experts”). And at least a year if I count the time they have ignored the above link I found from Jan 23. So I’m guessing they are not going to solve it.

That leaves me with the “solution” to leave site5 for another web hosting site. One that is full service in the email host department as well. Does anyone have recommendations? Basically I code my web site in HTML directly, put it on a server, and maintain an email address at that server site to handle hobby related mailing list emails as opposed to my main Goggle email.

Is leaving them my best option? Or are there other solutions?

Thanks, John