Address Error 016-767 on a Dell 2135cn printer

We've been using our Dell 2135cn printer/scanner for years now with no issues, but suddenly this morning we cannot scan to email anymore without the printer beeping a warning about an Address Error 016-767 occuring (this now happens with all of our email addresses pre-programmed in or just typed in). We have not changed a thing between last week and this week to cause this to happen (that we know about).

I have looked at our web screen showing us printer status, printer jobs, address book, etc, and nothing has been altered.  Our emails are all working normally as well (sending and receiving).

Any help in this urgent matter would be greatly appreciated. Thank you in advance!

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