The Enron Email Corpus provides ``Real World'' text in the business email domain, which is a target domain for many speech and language applications. We present a section of this corpus annotated with number senses - labelling each number as a date, time, year, telephone number etc. We show that sense categories and their frequencies are very different in this domain than in newswire text. The annotated corpus can provide valuable material for the development of number sense disambiguation techniques. We have released the annotations into the public domain, to allow other researchers to perform comparisons.