The (block) sender will not be notified. Is this true?
On page https://mail.aol.com/webmail-std/en-us/suite# for Block List - Block messages from specific senders, is the statement "The sender will not be notified". Is this true? There are a couple, if not the same, SPAM senders that use five (5) characters included in their domain name that gets changed after I enter the latest SPAM address. If they are not notified, how do they know they have to change the 5-character combination to get past being blocked?

Hi there. Senders will not be notified. Spammers are constantly evolving their practices and blocking their email addresses does not help, as they are mostly sending emails from spoofed addresses or they send the same content but from different email addresses, which makes it look like they are coming from the same email address. We do recommend the block feature for people, not spammers.
Marking them as Spam teaches your personal filter to recognize them as Spam. I'm sorry there is no quick fix for this issue!