Sorry for one of these work-based etiquette threads but I'm not sure what to do about this one.

Essentially I work as an administrator and there are two other administrators for different teams. The other two administrators have sent an email to all three teams and also stuck a sign up repeating this information with regard to appropriate etiquette when dealing with administrators.

They make some good points but the sign/email is rude, confrontational and petty and I'm really not happy that it's gone out with an implication that, as I ama also an administrator, I endorse and approve of said email and sign.

On the one hand I don't want to openly undermine/criticise my colleagues by sending an email to my team apologising for the email. On the hand I don't want the team I work for to think I had anything to do with such a petty, trivial and aggressive email.

What do I do?