Comodo Antispam Gateway

• Introduction To Comodo Antispam Gateway
  • Release Notes
  • Purchase License
  • License Information
• Get Started
  • Incoming Filtering Configuration
    • Configure Your Mail Server
    • Configure MX Records
      • Update MX Records In Windows 2003/2008 Server
      • Update MX Records On A Host Using BIND
      • Update MX Records For Comodo DNS
      • Update MX Records For GoDaddy
      • Update MX Records For Enom
      • Update MX Records For Network Solutions
      • Update MX Records For Yahoo! Small Business
      • Update MX Records For 1and1
      • Update MX Records For 4D Web Hosting
      • Update MX Records For DNS Park
      • Update MX Records For DreamHost
      • Update MX Records For DynDNS
      • Update MX Records For IX Web Hosting
      • Update MX Records For No-IP
      • Update MX Records In CPanel
  • Outgoing Filter Configuration
    • Per-User Authentication
    • Outgoing Smarthost Setup
      • Configure QMail To Use A Smarthost
      • Configure PostFix To Use A Smarthost
      • Configure Sendmail To Use A Smarthost
      • Configure Exchange 2000/2003 To Use A Smarthost
      • Configure Exchange 2007/2010 To Use A Smarthost
      • Configure Exchange 2013/2016 To Use A Smarthost
      • Configure Office 365 To Use A Smarthost
      • Configure Exim To Use A Smarthost
        • Configure Exim / CPanel To Use A Smarthost
        • Configure Exim / Directadmin To Use A Smarthost
    • DNS Configuration
• Login To The Admin Console
• The Dashboard Area
• The Admin Console
• Domain Management
  • Add A Domain
  • Delete Domains
  • Edit Domains
  • Validate Domains
  • Manage A Domain
    • Domain Dashboard
    • Incoming
      • Quarantine
      • Manage Archived Mails
      • Incoming Spam Detection Settings
      • Report Spam
      • Delivery Queue
      • Destination Routes
      • Local Recipients
      • Clear Incoming Cache
      • Log Search
      • Domain Aliases
      • Domain Settings
      • Manage Report Subscriptions For Selected Domain
      • Relay Restrictions
      • Geolocation Restrictions
      • SPF Control Settings
    • Outgoing
      • Clear Outgoing Cache
      • Log Search
      • Users
      • Office 365 Activation
    • Email Management
      • Email Size Restriction
      • Blocked Extensions
      • Released Requests
      • Blacklisted Requests
      • Whitelisted Requests
    • Domain Audit Log
      • Audit Log Configuration
      • View Domain Log
    • Domain Rules
      • Rules
      • TLD And GTLD Rules
      • Recipient Whitelist
      • Sender Whitelist
      • Recipient Blacklist
      • Sender Blacklist
      • Whitelist Senders Per User
      • Blacklist Senders Per User
    • Account Management
      • User Account Management
      • Manage User Auto-import
      • View User History
      • Import Users From LDAP
        • LDAP Import Configuration
        • LDAP Import Confirmation List
        • LDAP Import Ignore List
• Audit Log
• Administrator Account Management
  • Administrators
  • User Groups & Permissions
  • Admin Groups & Permissions
  • My Comodo Account
  • My Profile
  • Users History
• Customer Management
  • End User License And Subscriber Agreements
  • View License Information
  • Manage Report Subscriptions
  • Notification Email Settings
• CASG Reports - An Overview
  • Quarantine Report
  • Domain Statistics Report
  • Auto-Imported Users Report
  • Quarantine Release Report
  • Reported Spam Report
• Appendix 1 - CASG Error Codes
• Appendix 2 - CASG Comparison Table
• Appendix 3 -Troubleshooting LDAP
• Appendix 4 - Useful Links
• About Comodo Security Solutions

TLD and gTLD Rules

• You can allow or deny mails based on the top level domain (TLD) of the external mail server.

• By default, CASG accepts mails from all TLD names.

• You can also add custom TLDs from which you want to allow/block mail.

Open the TLD interface

• Click 'Domain Rules' > 'TLD & gTLD Rules':

• 'Accepted domains' shows TLDs according to location, and gTLDs by alphabetical grouping. These categories are shown in the column headers and are known as 'Rule Groups'.

• All TLDs are enabled (accepted) by default.

• You can disable TLDs/gTLDs from which you do not want to accept mail.

The interface also allows you to:

• Add new custom TLDs

• Configure TLD based mail filtering

Add a new custom TLD

• Click 'Add' from the Accepted domains interface

The 'Add filter rule dialog' will appear.

• Choose the category from the 'Rule group' drop-down

• Enter the TLD name, without the '.' prefix, in the 'Domain suffix' text field

• Click 'Save' to add the TLD to the list

• To allow the emails from mail servers with the new TLD, leave it selected

• To block the emails from the mail servers with the new TLD, de-select it.

Configure TLD based mail filter

• Deselect TLDs from which you want to block mail. Enable TLDs from which you want to accept mail.