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62 Barracuda Spam Firewall Administrator’s Guide

Sender Domain Filters

Sender Domain Block/Accept allows you to filter messages based on the sender’s e-mail address.

The following table describes the filters on this page.

Blocked IP Range Add any IP addresses or networks to your blacklist. To add an

individual IP address, use a netmask of 255.255.255.255. To help you

calculate the correct subnet mask for a range of addresses, use a

subnet mask calculator.

Blacklisted IP addresses/networks bypass all whitelists with the

exception of IP address/network-based whitelists. You can specify

whether the IP/Range should be blocked, quarantined or tagged.

Click Add after adding each entry, followed by Save Changes.

Note

Use the Comment field to add any notes about the blocked IP address. This is useful if more than

one person manages your Barracuda Spam Firewall.

Table 5.4:

Filter Description

Allowed Sender

Domain/Subdomain

Add any domains or subdomains that you wish to include in your

whitelist. Whitelisting a domain automatically whitelists all subdomains.

For example, adding customer.com allows messages from

[email protected] as well as j[email protected].

Do not use wildcards (such as *) or the @ sign when entering a domain.

For example, just enter customer.com instead of *@customer.com.

Whitelisted domains/subdomains bypass spam scoring as well as all

other blacklists, but do go through virus, IP block/accept and

body/subject filters.

Click Add after adding each entry, followed by Save Changes.

Blocked Sender

Domains/Subdomain

Add any domains or subdomains that you wish to block. Blocking a

domain automatically blocks all subdomains. For example, adding

spammer.com blocks messages from joe@spammer.com as well as

[email protected].

Do not use wildcards (such as *) or the @ sign when entering a domain.

For example, just enter customer.com instead of *@customer.com.

Blacklisted domains/subdomains bypass all whitelists with the

exception of IP address/network and domain/subdomain-based

whitelists. You can specify whether the IP/Range should be blocked,

quarantined or tagged.

Click Add after adding each entry, followed by Save Changes.

Table 5.3:

Filter Description

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 141 142

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