Whitelist And Blacklist Rules

This chapter covers the whitelisting and blacklisting features of the Syneto UTM/TEP. Access to the configuration screen is via Email -> Whitelist & blacklist menu.

When first accessing this menu. both white & black lists are empty by default. A set of lists is available for each protocol: SMTP & POP. [Fig.1]
[Fig. 1] – Default whitelist/blacklist screen

Creating a Blacklist

Click the “Add blacklist rule” button to start adding rules. In the pop-up you have to specify the sender and the receiver of the emails you want to blacklist. By default “Any” is selected for both options.

In each category you can specify only one of the available options [Fig. 2].

For “Block email coming from”

any sender – default
IP address – a complete IP address or a regexp
email – a complete email address or a regexp

For “and going to receipient”

any sender – default
email – a complete email address or a regexp

Note: only * (asterisk) and ? (question mark) regexp characters are allowed (ie. *@gmail.com, george@*.com, 123.123.123.*, 123.12?.12?.12?). Everything else is automatically skipped.

Important! Blacklists take precedence over any whitelist rule.

[Fig. 2] – Adding a blacklist rule

After adding the rule, it immediately appears in the black list. You are not required to click on any “Apply” or similar buttons, the rules are automatically applied.

Creating a Whitelist

Whitelist creation is similar to the process described above with a small exception. Whitelist rules can be specified on a per-engine base. This way you can refine your policies for skipping Greylisting and IP Reputation, Spam scanning, and Virus scanning. [Fig. 4]
[Fig. 4] – Creating a whitelist rule

Adding rules from the SMTP Domain screen

When you configure your SMTP Domain, you are presented with the option of adding whitelisted and blacklisted senders to your lists. These rules will automatically set *@yourdomain.org as recipient. [Fig.5]
[Fig. 5] – SMTP Domain whitelist/blacklist

Quarantine Digest Whitelisting

Email addresses can also be whitelisted from the quarantine digest repost. To whitelist an address simply click the appropriate link. [Fig. 6]

[Fig. 6] – Quarantine digest whitelisting