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2. Domain Name System blocklist - Wikipedia

   en.wikipedia.org/wiki/Domain_Name_System_blocklist

   A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist (DNSBL) or real-time blackhole list (RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [1]

3. Block and unblock email addresses in AOL Mail

   help.aol.com/articles/block-and-unblock-email...

   Block email addresses. 1. Open an email or select it from your mailbox. 2. Click the More icon. 2. Click Block Senders. 2. Optionally, select to also delete emails you've received from the sender.

4. Find and remove unusual activity on your AOL account

   help.aol.com/articles/find-and-remove-unusual...

   Monitoring your recent login activity can help you find out if your account has been accessed by unauthorized users. Review your recent activity and revoke access to suspicious entries using the info below.

5. Spam and Open Relay Blocking System - Wikipedia

   en.wikipedia.org/wiki/Spam_and_Open_Relay...

   The list includes wide networks of computers sharing the same IP address using network address translation which are also affected (If one computer behind the NAT is allowed to send spam, the whole network will be blacklisted if the NAT IP is ever blacklisted.) This is a common method of pre-emptive blocking as most legitimate mail servers are ...

6. Keep your inbox clean by blocking unwanted mail in AOL ...

   help.aol.com/articles/keep-your-inbox-clean-by...

   3. Right click on the email address. 4. Select Add to Blocked Addresses. 5. Click Ok to confirm. Block email addresses from Settings 1. Sign in to Desktop Gold. 2. Click Settings. 3. Click Mail. 4. Click the Spam Controls tab. 5. In the box under Block mail from addresses I specify, type the email addresses that you do not wish to receive mail ...

7. Mail Abuse Prevention System - Wikipedia

   en.wikipedia.org/wiki/Mail_Abuse_Prevention_System

   MAPS was founded in 1996 as a non-profit organization to pioneer innovative anti-spam techniques (e-mail).. The early history of MAPS is the History of DNSBLs itself. Dave Rand and Paul Vixie, well known Internet software engineers, started keeping a list of IP addresses which had sent out spam or engaged in other objectionable behavior.