I have added an AOL account with these settings

Incoming Mail Server: imap.aol.com, port 143 or 993, Security: None or SSL
SMTP Outgoing Server: smtp.aol.com, port 587, Authentication

The issue (only for AOL account): sent messages are delivered to destination, but are not saved in any folder, locally or on the server. I wish I have synchronization for all the folders in the mailbox.