Interesting. I took the address from the reply I got, which it seems is different to the one to contact them on. For the record punctuation makes a big difference on the bit before @, including full stops/periods, etc. It's a totally different recipient dispite the similarities, and unless they've registered different email addresses that filter to the correct one, near approximations won't count for anything.
Rhino must have updated their email address or deleted some. I have an email from [email protected] in my inbox dated Oct 7, 2016.