Identifying an user

RT Users
1

When an email is sent to RT, how is an user uniquely identified?
EmailAddress and RealName?

2

When an email is sent to RT, how is an user uniquely identified?
EmailAddress and RealName?

Out of the box, it’s by email address.

3

Jesse Vincent wrote:

When an email is sent to RT, how is an user uniquely identified?
EmailAddress and RealName?

Out of the box, it’s by email address.

Then I must be doing something wrong here. I am sending test emails

from two of my accounts (gmail and a work one) and the gmail one is
giving me grief because it cannot create another user because, I
believe, it shares the same username/RealName as my work one. I tried
without my last name and it worked fine.