More hindrance than help
A few days ago my bank send out an email about this. Or, strictly speaking, they didn't. They had a marketing company spammer send it out with a From: line purporting to be the bank, naturally a noreply address.
So I have an email purporting to be from the bank but originating from an IP address not owned by the bank. Look like a phishing email much?
And it gets worse. There are several links in the email which appear to point to the bank's domain. However when I look up the address of the sub-domain server for these links (the same subdomain used for the From: address) it's not in the bank's block. It belongs to the same spamming business that sent the email. Look like a phishing email supported by a bit of DNS poisoning much?
The only indication that it's probably from the bank is the address to which it was sent. It's one that's provided only for the bank.
Instead of training customers to be aware of scams, the overt purpose of the email, it's actually training them to be phished.
And I wonder if their IT security manager, assuming they have such a thing, is happy to have a subdomain resolve to a server not controlled by the bank. If I were in that position I'd be livid.