Andrew,

Well that's good, because my response to your email was returned...

"The following message to <censored was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'5.7.1 <censored... Relaying denied'

Jim Cone
San Francisco, USA

"Andrew"
wrote in message
...
Thanks Jim. I also found a formula that uses the MOD function that also works at
http://www.mvps.org/dmcritchie/excel/condfmt.htm
Andrew