Can't send MMS messages (but can receive) About a week ago I lost the ability to send MMS messages. I can still receive, and single-recipient SMS works fine. The phone is a Moto X, stock. I did recently install some new apps; could one of them be interfering with the messaging app?

EDIT: the message I get is invalid destination address or could not send message.
This may help
  
  i have test Moto G
  
  1.Open Message
  
  2.Choose Attach Option on right side Options(Picture,Capture picture,Videos,Capture Video,Audio,Record audio and Slideshow).
  
  3.Choose Capture Video/Videos,if choose video then we have send small video otherwise its not selected.
  
  4.Then last Send MMS.