Syntax for multiple service exclusions?

What is the correct syntax for multiple service exclusions?

I have tried:

HOST=server1 MAIL craig at mail.com RECOVERED EXSERVICE=vmio EXSERVICE=memory

and

HOST=server1 MAIL craig at mail.com RECOVERED EXSERVICE="vmio|memory"

but neither works and I can't work it out from the man page...

Does every parameter take regular expressions?

Thanks

Craig Cook

Systems Monitoring Consulting and Support Services http://www.cookitservices.com