You can add only one, i would suggest you can create  distribution list (whoever needs to be alerted) and provide that address there.
I think I know the answer but I'm hoping I am not correct. In Unisphere for Vmax, I am setting the Alert settings for Email under All symmetrix/Home/Admin/Alert Settings/Notifications/Email configuration. I can add 1 email address or distribution group to the email address for each symmetrix but if I attempt to add a second one, i receive an error 'too many @ signs'. I've tried ; or , or : as delimiters between email addresses in the field so I am assuming I am limited to 1 email address in the distribution list. is this true? that we can't have more than 1 email address as a distribution for alerts?  thanks.  Jim
unisphere vmax alerts