I have several forms where I use the admin email (it actually gets sent to our property manager), and that works a far as I can tell but the mailback email does not. This is supposed to be a "copy" of a reservation sent back to the person who is making the reservation, but it just doesn't happen.
Can you send me your backend access so I can check this out for you ?
Send your info to support@crosstec.org and make sure to add this topic as a reference.
Also add your username to the email.
got same problem. Admin mails works perfectly, but Mailback does not work. Mail is not send. I have tried several email addresses, including spam folder checked.