I've been trying unsuccessfully today to send an email to a Rogers.com address I've sent to previously and successfully for years. The email keeps getting refused with a "Message not sent; one or more addresses were not accepted. Rejected addresses: XY & Z <email@example.com>". The address is also in my Contacts list, but neither selecting the contact nor typing it in directly (just the address itself without the dressing) works any better.
I was able to send an email to that address successfully from my gmail account just now, so the problem is not at Rogers' end; it's with Shaw. What gives? Anyone else seeing anything like this?