Bot latency plugin for Dragory's ModMail
Make sure your running at least v3.0.3 of Modmail. in your config.ini file, make a new line and add:
plugins[] = npm:MMPlugins/PingRestart your bot!
And that's it! Use [prefix]ping (by default, your prefix is !) and watch the magic!
This command also works in DMs - but it will create a thread channel.