This is sadly a quite common issue but something we are working on and while we made some progress it doesn't work for everybody.
Apart from checking your spam folder, as Mark suggested, you may also want to check with your email provider that they don't block emails from Airliners.net, because sometimes emails are blocked at the source and don't even make it to your spam folder.
Another option is to switch to another email account. Gmail and Yahoo are normally working fine with Airliners.net mails.
Also you might wanna check the Rejected photos page again as the personal messages should be listed there in the bottom right corner where it says " Reject reason"; the message is not highlighted or something so it is easy to miss but it should be there.
Should you have further questions, don't hesitate to contact us at firstname.lastname@example.org
"Go ahead...make my day"