Why don't all banks have "Spoof@"?

I just received a customer survey email from my bank.  Good old First Direct.  I doubt the email, primarily because they have never sent me one before.

So I did what you do with eBay and PayPal.  I forwarded it to "spoof@firstdirect.com".  I love that facility.  It ought to be a standard.

And First Direct doesn't love it.

Technical details of permanent failure:

Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 Mailbox unavailable or access denied - (state 14).

Right.  So they don't understand that an emerging standard is present, and they don't know how to handle it.  Isn't that just great customer service?

And the survey?

I opened it.

First it was wider than my browser window which is set to maximum screen size on my laptop, and second, it had too many mandatory questions.  I abandoned it.  No idea if it was genuine or not, though.