Thanks for following up, we were able to determine this was a configuration issue on my end. I had mistyped the port number for the connection to the SMPP provider.

Thanks for the response. So far I have been testing with very short messages to one phone number. I had the message payload option checked, I just tried unchecking it and sending another test. Still not getting the message and I don't see anything in the logs. Would you mind sharing what provider yo...

Thank you for the replies, I have tried to send another SMS message with the same result.  I have let this one run for about 3 hours, with no additional information appearing in the logs.  

Hi, I have setup ClickSend as an external account using their guide:https://help.clicksend.com/article/l6hbrh9y82-send-sms-with-adobe-campaign I've sent them our IP addresses provided by Adobe Support to have them whitelisted.  However, when I try to send an SMS, nothing appears to happen. I've enab...