URGENT: Corrupt PDF documents being Emailed

Starting on 9/20/18 3:14 PM CST all notification emails received have PDF forms that are less than 1000 bytes and will not open in Acrobat Reader.  The PDF documents are normally more than 12KB in size.  See below

I have checked your form and I noticed that you're using a custom sender with the SMTP method, attachments are not currently supported with SMTP senders so you will need to switch to a default sender, either noreply@jotform.com or noreply@formresponse.com, you may also turn off the attachments in case you need to use the custom sender. 

Thanks. 

This was working as configured before 9/20/18 3:14pm CST.  Why has it stopped?

This is what's inside the PDF document.

{"message":"Operation Completed","success":true,"duration":"10.347"}

That doesn't look like an SMTP issue.

To give you the benefit of the doubt, I changed the SMTP configuration to noreply@formresponse.com and we will see if this fixes it.

...dly

Ok, changing the SMTP configuration fixed this issue.