On the Settings tab in Rentec, under Your Contact Information is a field for you to enter your email address. We generally use the email address there to send you notifications from us.
The email address you list there, is also used when you send tenants, property owners, or vendors emails using our software program. Due to their strict policies, AOL and Yahoo do not allow you to send emails out using a program like ours. If you plan to use our program to send out emails, you will want to use another email address and add it into the Settings > Your Contact Information area instead.
We find that Google or Gmail email accounts work best.