I have been using a sendmail task to attach a record summary as a PDF attachment for a long time, but all of a sudden it has started failing. Remove the attachment and it all works fine change the attachment command to 'as Inline' instead of 'as PDF' and it also works fine. 

The thing is this script has been working for nearly a year and has't been changed at all. And the record summary template being attached also hasn't changed.

About 7 or 8 months ago I had exactly the same problem and Zoho support fixed it very quickly as several users were experiencing it. 

Are PDF attachments working for everyone?

Have tried enabling and disabling the PDF Generation Beta in settings but it makes no difference to this problem. 

Currently I've gone back to 'As Inline' for the attachment so that users don't see the error log message when they submit the form. The data submits fine - just the sendmail with the attachment fails As PDF.

Any advice or suggestions gratefully received