Not receiving email Notification

However, every time a form is submitted with an upload, it is not delivered into my own email nor the recipient's email. It works well without the attachment. I get the forms that are submitted with an attachment on the jotform webpage, just not in the email.

If I understood you correctly you are not receiving email Notifications when your forms are submitted. 

I have checked email address that is set as recipient email inside of your notifications, inside of our email log and all submission were sent successfully.

Autoresponder emails were also sent successfully. 

You can also check the email logs for yourself on this link:

http://www.jotform.com/help/293-How-to-view-all-your-form-Email-History 

Also I have checked and your Email address is not on bounce list.  

Please check spam, trash and bulk folders and if you find them there please mark them as not spam in order to not go into the folder any more.

I would also suggest to set Sender name inside of your email Notifications.  

http://www.jotform.com/help/208-How-to-setup-email-alerts-to-prevent-email-bouncing-related-issues 

To avoid it happening in future I would suggest checking this guide: Whitelisting JotMails IP Addresses

Hope this will help. Let us know if you need further assistance.