"Install the MMS Fix (Valkyrie) (attached) and let the phone reset
After phone comes back up, go to the messaging tab and click on "all messages"
Click on "Menu"
Click on "Settings"
Click on "Options"
Click on "Menu" again
Click on "MMS Server"
Click on "VZW"
Set the following:
Server Address:
http://mms.vtext.com/servlets/mms?X-VZW-MDN=(10 digit phone number)
Connect Via: My ISP
Send Limit: 1024 KB
WAP Version: None
Then make sure that VZW is set as the default (it should be already from installing the MMS fix)
I used those steps and can send and receive all messages through HTC messaging."
I can confirm that this works on my phone with Verizon - perfectly.