Spam

Question 1

What is SPAM

Answer 1

Unsolicited messages, email, forum messages, advertising, phishing attempts, etc.

Question 2

What is SPIM

Answer 2

Spam over instant messaging

Question 3

How do you identify and stop SPAM

Answer 3

Stop it at the gateway before it reaches the user by filtering email on-site or through cloud-based gateways. Set up your email system to only receive emails from trusted senders (allowed list), block anything that doesn’t follow RFC standards.

Question 4

Reverse DNS (rDNS)

Answer 4

Block emails where the sender’s domain doesn’t match the IP address

Question 5

Tarpitting

Answer 5

Intentionally slowing down the email servers. This will slow down the senders email server as well and they will get frustrated and skip over your system. They want to send out as many emails as possible as quickly as possible.

Question 6

Recipient filtering

Answer 6

Block all email not addressed to a valid recipient email address