AOL Mail limits on sending bulk mail
In order to better enforce anti-spam policies, AOL does not disclose the number of recipients or emails that can be sent at one time.
If you've received a notification that a limit has been met, you'll need to wait a set amount of time before you can send more emails. Most sending limit notifications inform you of how long you'll have to wait.
If you're planning to regularly send bulk email, consider looking into alternate solution.