Email spoofing can affect AOL mail in a drastic way because those non-AOL mail users can misuse your authentic AOL email address to trick people into thinking it's you thereby leaking private information and files. Some measures that you can take to prevent this are:
Change your password at regular intervals.
Use top notch security software to protect yourself from online hackers and spammers.
Do not open suspicious emails.
These safety measures can secure you from spoof emails. For more information, you can contact AOL email technical support number.