ActiveXperts SMPP Simulator

ActiveXperts SMPP Simulator is a multi-threaded SMPP simulator that includes advanced SMS features and enables you to monitor incoming and outgoing emails.
It comes loaded with some practical options, such as auto-reply for each email address.
Wrapped up in a classical-looking interface that doesn't put emphasis on looks, ActiveXperts SMPP Simulator contains comprehensive configuration settings mostly aimed at experienced PC users, since it's not that intuitive to work with.
After a fast setup operation that shouldn't impose any difficulties, you are greeted by a large window that shows most options available in this software application.

Configure email server settings, view logged data, and set auto-reply

You can edit server settings when it comes to the protocol type (IPv6/IPv4, IPv6, iPv4), port number, message reference, GSM encoding method, deliver and multipart mode, along with PDU timeout and Enquire interval.
It is possible to log in with authentication details, enable echo and specify the number of messages to keep, clear all emails, configure the failure rate, activate an auto-reply system for specific email addresses, analyze log information for the server and session, and so on.

Overall, an advanced SMPP simulator with SMS features

The tool didn't put a strain on the overall performance in our tests, thanks to the fact that it needed low CPU and RAM to work properly. It had a good response time and didn't hang, crash or show error notifications.
To sum it up, ActiveXperts SMPP Simulator provides expert users with a pretty reliable SMPP simulator with SMS messaging features that lets them set up an auto-reply system as well as oversee incoming and outgoing emails. You are welcomed to give it a shot to find out whether it meets your requirements or not. Too bad it's not that approachable.