Product manual

GFI MailEssentials 7 Anti-Spam | 101
7 Anti-Spam
The anti-spam filters included with GFI MailEssentials help detect and block unwanted emails (spam).
Topics in this chapter:
7.1 Anti-Spam filters 101
7.1.1 SpamRazer 102
7.1.2 Anti-Phishing 105
7.1.3 Directory Harvesting 107
7.1.4 Email blocklist 110
7.1.5 IP DNS Blocklist 112
7.1.6 URI DNS Blocklist 114
7.1.7 Sender Policy Framework 115
7.1.8 Anti-Spoofing 117
7.1.9 Greylist 119
7.1.10 Header Checking 121
7.1.11 Spam Keyword Checking 124
7.1.12 Bayesian Analysis 128
7.1.13 Whitelist 130
7.1.14 New Senders 134
7.2 Spam Actions - What to do with spam emails 135
7.2.1 Configuring Spam Actions 136
7.3 Sorting anti-spam filters by priority 138
7.4 Spam Digest 139
7.4.1 Configuring spam digests - Administrator spam digest 139
7.4.2 Configuring spam digests - Recipient spam digest 140
7.5 Anti-Spam settings 142
7.5.1 Log file rotation 143
7.5.2 Anti-Spam Global Actions 143
7.5.3 DNS Server Settings 144
7.5.4 Remote Commands 145
7.5.5 Perimeter SMTP Server Settings 148
7.6 Public Folder Scanning 149
7.6.1 Enabling Public Folder Scanning 149
7.6.2 Using Public folder scanning 153
7.1 Anti-Spam filters
GFI MailEssentials uses various scanning filters to identify spam:
FILTER DESCRIPTION ENABLED BY
DEFAULT
SpamRazer An anti-spam engine that determines if an email is spam by using email
reputation, message fingerprinting and content analysis.
Yes
Anti-Phishing Blocks emails that contain links in the message body pointing to known
phishing sites or if they contain typical phishing keywords.
Yes