Please be sure to check your spam folder if you do not receive an email from us within the next 24 hours or less. (voltanadventures.com)
If you work in a large office where you have an IT department manage your email, you may be blocked from receiving emails with. (lawyerist.com)
The best way I know of is to make sure you are a member of one of their partners and then make sure you are signed up for receiving email notifications from said partner. (travelbythemile.com)