Monitoring and Detection: Email Analysis and SMTP Logs

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Security

Monitoring and Detection: Email Analysis and SMTP Logs

In this lab, you'll practice email and SMTP log analysis. After completing it, you'll be able to investigate suspected spam or phishing, determine its validity as well as the principles and configurations behind SMTP open relays.

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Lab Info

Level

Beginner

Last updated

Oct 15, 2025

Duration

1h 0m

Challenge

Identifying Email Provenance

Let's check where an email is from. Does it seem to be legit? Is it coming from a source that is authorized to email on behalf of this domain?

We'll find out!
Challenge

Verifying Email Legitimacy Using DKIM

The finance team has sent money to a vendor, who claims not to have received it. The finance team had received an email asking for funds to be deposited to a new bank account.

Can we prove it really came from that vendor?
Challenge

Investigating SMTP relays

Someone has reported to your team that your email server is being abused as a relay for spam. We will investigate server logs and configuration to determine if that is the case.
Challenge

The Last Challenge

Welcome to the final challenge! This is your last chance to experiment in the environment. Clicking Finish Lab will end this little world that flittered into existence just for you.

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