Email is very important for any web hosting package because this is what allows you to establish, organize, and manage all your correspondence with other contacts relating to your web hosting. You wont come across any web hosting site that doesnt offer email as a staple service in their package. Every Hostgator review will give different information on this feature, but generally the following are the things generally mentioned:
Unlimited access to basic email functions this include POP3 Email Accounts (SMPT included), mail forwarding, email addresses, auto responders, mailing lists. All of these are UNLIMITED once you sign up for a package.
Webmail access through Hostgator is brought to you by SquirrelMail, RoundCube, and Horde.
Thanks to IMAP supports you even get to receive your email to your mobile phone.
Lastly, any hostgator review will tell you how important security for your email is. Thats why Hostgator offers SpamAssassin in its set of email security tools.