Sending a few images to one person is not breaking the acceptable use policy Look through the aup, and try to follow it's guidelines rigorously Like most google products this will probably deteriorate and then be discontinued.
Google Messages Gets New Icon and Plethora of New Features | Beebom
Going back about a week now, google voice users have been experiencing message delivery errors
The errors pop up seemingly at random and point users to voice’s acceptable use policy
My texts are suddenly not sending There are two stages of blocking Initially, a google voice number may be temporarily blocked from calling and/or sending text messages It will refer you to google's acceptable use policy.
This occurs if a message is identified as spam or unwanted or flagged as objectionable and blocked by a wireless carrier, as defined by the filtering system Below are possible solutions to avoid this error. Some of those things may be legit spammy looking (large numbers of similar messages to different people) and some may be some sort of weird bug