Which of the following spam filtering issues stops valid messages from being delivered?

You have been told by several of your friends you have recently sent SPAM emails to them, what could be the cause of this and what should you do?

What is ransomware?

Why are disposable email addresses useful?

Which is most likely something that could be considered strange account activity and may require further scrutiny on an e-commerce site?

Which is not an example of an anti-spyware tool?

What is Phishing?

Suppose you got a mail from the HSBC bank asking you to give your online bank account details. Under which of the spam mail categories does this mail?

Which program establish modem connection with pay-per-visit resources?

How many keys are required if two parties communicate using Asymmetric Cryptography?

What are zombies?