email notification problem

Hey guys, got a weird problem. I use multiple forms on my website which all previously send an email when a new entry submitted. Problem is that all stopped sending notification emails except 1 form. I double checked all settings and all are 100% similar, using the same emailadres. Checked email spam folder, nothing. It worked perfectly till a few weeks ago when I duplicated a form. That's the only thing I can come up with what changed. Double checked all fields, but nothing strange. Read about hosting not supporting sending email by PHP, but never had a problem with that and still 1 form is working. Any thoughts? Everything is up-to-date and my hoster is Media Temple. Hope you can help me out, because checking form entries by hand is a little 2007 ;P

Hi Chris, thank you for your reply. As off today I start getting new notifications again. Yesterday I noticed I wasn't using my file check scripts on the specific form which checks if files are over 4MB or 1024px wide. I guess the problem was including all fields in the notification email and people sending me 10 files (max files to include in the form) larger than 4MB so my host couldn't email them. Since I didnt have problems with a form which only allowes 1 file at the time. So... problem solved :)