limiting smtp message size

Does anybody here limit size of smtp e-mail messages accepted by mail exchange and if so, what max size (including attachments)? I have a customer who thinks that we were being unreasonable for rejecting a 20Mb email :-) regards Peter Mott Chief Enthusiast 2Day Internet Limited http://www.2day.net.nz -/- --------- To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog