Hi bath, Hope you're well.
AOL are the worst email addresses to send anything to by a long way. they have incredibly (over) strict spam filters in place which are well known for filtering out non spam mails by the thousand! then just to make it worse whereas almost every other mail system in the world would either notify either the sender or the receiver of the mail in some way that the mail wasn't delivered AOL just delete mails without informing either party!
This pops up at work about once a month with somebody trying to send mails to an AOL address and it's not getting through, my advice is always to tell the person with the AOL adress to stop using AOL and the problem will be cured.
the only thing that may help is, if you are sending the mail to several different addresses at AOL send them separately, so 6 separate emails with one address for each mail, not as one mail sent to all 6 addresses (does that make sense :)) as mails to multiple AOL addresses almost always seem to get flagged a spam and deleted.