[Plugin: WordPress Form Manager] no admin confirmation email

This is a bug with the way FM sends e-mails. Basically, FM sends two separate e-mails, in order to hide the admins’ e-mail address from the user, but some hosts don’t allow you to send different e-mails without waiting for a certain amount of time, even though you can usually send a single e-mail to many different destination addresses without a problem. This is something the host does to prevent spam from being sent by your site, but is fairly common, so I consider it a bug. I don’t have a fix yet, though.