How to control receiving an error email

Summary:

Please tell me how to control receiving error emails or how to set up a dummy fax.

Content (required):

After 23C release, the buyer will receive an error email when the purchase order is sent if "FAX" is set in the communication method without setting up a FAX. However, I wouldn't like to receive an error email, and I would like to "FAX" is still set in the communication method and is not actually sent.

Is there a way to control receiving this error email? If no, I would like to set up a dummy fax and avoid it, please tell me how to set it up.