Bank e-mails.

Banks tend to prefer to use feedback forms. The reason is that, as anyone who has made the mistake of publishing their email address will confirm, there are too many spammers who will bombard any email address they can find with rubbish. I suspect also that you might find a few banks do not respond well to email enquiries. It is easier to ignore an email than a letter or a phone call.

I don't know - they get pretty irrate and respond very quickly when you start quoting your account number in an email.