How to send bulk messages to Messenger contacts in batches
I assume you are logged into Chatsilo.
You can make limit to send your messages in batches instead of sending everything at once.
Here I have selected 5 contacts if I put 2 in limit, only 2 messages would be sent for the first time.
If I don't close my tab and I come back to it after some hours, there would be resume button.
If you put 4 in the limit, then 4 would be sent out of 5 or if you put 5, all the remaining 3 would be sent
The only condition you need to take note is that the tab must not be closed.
I hope this helps.