Hi Anton,
Everything seems to be working fine now. Im sure i can’t expect the effectiveness is 100% (100 sent/100 delivered) but now the rate is over 80% which i think is good.
Now, we are still conducting some tests because, apparently, we came back to that time where all messages (sent and not delivered) were charged and debited from an account. We will run more tests today and if we keep having the issue i will open a new topic.
Thanks.