Zoho has stopped accepting pdf's for delivery

Zoho has stopped accepting pdf's for delivery

We are an SMB that relies on sending PDF reports to customers.
As of today July 18, 2022, Zoho has stopped sending emails via remote
SMTP connections that contain any reference to pdf in the filename. This
filetype is not in violation of the Secure Attachment Policy posted here:

https://www.zoho.com/mail/help/secure-attachment-policy.html

What can be done to allow us to send pdf files as we used to? This is
a critical problem for us and will have to discontinue using Zoho if
it cannot be addressed.

Thanks.