Forums Bug Reports on CONNECT not firing with no MOTD

When mIRC gets "End of MOTD" after connecting, it assumes that connection is finalised and commands can be send to the server. Server ignores commands sent before the MOTD (some IRCds will show "You have not registered" or "Register first" message). You can check for yourself using on LOGON event.

edit:

/help on connect

The on CONNECT event triggers when mIRC connects to an IRC Server right after the MOTD is displayed.

So, if there's no "End of MOTD" or "MOTD missing", mIRC will not trigger on CONNECT.