Sent message notification , off

[Native]

Hi all

Can anyone help me, I want to turn off the notification sound for sent messages (sms)? 

I've tried going through settings, but I can't  see an option to turn off sounds for out going messages. 

Thanks

[_alexdon_]

I don't have XA1 at hand, but I use android messaging app from google and this works: go to messaging app, tap on the 3 dots, settings, hear outgoing message sound.