I tried everything, and it seems that it’s Verizon that’s causing the problem. Apparently, if they see anything that resembles “spam” they will slow down, and delay the sending.

To prove this, I now have the M1XEP send the emails to another email address, then I wrote a rule in the email app to forward anything that comes from M1XEP to my number@vzwpix.com. It’s stupid complicated, but it works perfectly — until Verizon flags that email also. I have my shop techies looking into a paid subscription for an Email-to-SMS service — maybe that will help.

I can probably call Verizon and have then whitelist the email, but I’m sure that would be painful.