Linux:
@steadysteve First off are you 100% sure it is a SMS that you are sending and not a imessage or RCS?
Yes, 100% sure ... old guy here - don't use either of those systems
Linux:
In my years at VodafoneNZ heard many times number is not blocked and when you do a SMS trace you see the SMS is actually delivered and the number was actually blocked by the handset
Hopefully that's not the case ... I've raised a ticket now, so we shall wait and see