In this video, Chaim Krause discusses briefly what greylisting is, and presents postgrey as an optional solution for implementing greylisting on our email server.
- [Instructor] I'd like to talk about…greylisting and Postgrey.…If you're not familiar with greylisting…what it is is a set of rules…that when an email server receives an email…it takes a look at where it came from…and where it's going…and if it hasn't seen it before…or meets some other criteria…there's a delay set and the email is not accepted.…The idea being that a normal email…would be tried again by the server…whereas a spam or virus email would not.…
That's just one small step…to help cut back on the amount of spam.…There's a nice package, Postgrey…that works with Postfix to do greylisting.…Let's go ahead and get that installed and configured to use.…I'm going to switch over to our mail server here…and let's take a look at the package.…If you remember, we earlier enabled the enterprise library…and you can see here that it is in that repo right now…that we can find Postgrey.…
Let's install that.…That looks like it installed properly.…Let's clear our workspace.…I'll jump back now to the world wide web…the ultimate source of documentation…
- 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: Multitasking at the Command Linewith Scott Simpson39m 1s Intermediate
Linux: Desktops and Remote Accesswith Grant McWilliams1h 44m 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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