What is an email alias and how can I log into my eXp email
An email alias is simply an email forwarding address. The mail server simply forwards email messages addressed to an email alias to another specified email address.
In your case, when an email is sent to firstname.lastname@exprealty.com it is automatically forwarded to your personal email address. Since this is an alias, no login information is needed as there is nothing to log in to except your personal email address.
If you want to send emails from your eXp account, you'll need to use a Gmail or Yahoo forwarding email address. Below are instructions on how to set up each email service to send messages as your eXp alias: