Cannot send email
recipient XXXXXXXX@yahoo.com can't be saved to draft. Please contact support.

Email is NOT sent to the recipient

It happens to other domains as well.

I am using my Zoho account to send to my test email account at Yahoo.com

I am using the free Outlook Mobile App (not the full Outlook app)

I have a second generation iphone SE running IOS 15.7

When I had my email through Host Gator, there were no problems.

I am connected to my Xfinity internet via Wifi

If I disconnect from my Wifi and use Verizon internet from the phone - same problem happens

I have tried port 587 SSL/TLS and port 465 SSL and I get the same result