In this video, Chaim Krause discusses DomainKeys Identified Mail and authenticating a sender through the use of a TXT resource record in the domain's DNS and PKI.
- [Instructor] DKIM, DomainKeys Indentified Mail. It's another attempt to cut down on the amount of spoofed emails on the Internet. Its purpose is to allow receiving email servers to detect if the email has been spoofed by comparing a digital signature in the email header compared with the DNS entry of the domain that is listed as the sender of the email. You can find information in RFC 6376 and a website you can look at is this one for more information.
What it looks like in practice is a text entry in DNS. Here's an example of one. Lists a key and then receiving email server looks at the signature in the header and compares it with that key. If they don't match, then there's a possibility it's spoofed. Well, this is another attempt at cutting down on email in the spoofed emails on the Internet.
- Reviewing the components of email delivery
- Sending mail with Postfix internally and externally
- Configuring TLS, SASL, and an email client
- Installing database tools
- Creating virtual domains, users, and aliases
- Exploring greylisting with Postgrey
- Installing and configuring spam tools
- Reviewing DNS-based protection against spammers
Skill Level Intermediate
Linux: Desktops and Remote Accesswith Grant McWilliams1h 44m Intermediate
Linux: Multitasking at the Command Linewith Scott Simpson39m 1s Intermediate
1. Basic Setup
2. Going Beyond Basic Services
3. Agent-Based Protection Against Spammers
4. DNS-Based Protection Against Spammers
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