ePrism User Guide - EdgeWave

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Configuring Email Security SPF (Sender Policy Framework) <strong>ePrism</strong>’s SPF support prevents spammers from spoofing mail headers and impersonating a legitimate email user or domain. Unsuspecting users may reply to these seemingly legitimate addresses with personal and confidential information. Sender Policy Framework (SPF) provides a means for authenticating the source of an email by querying the sending domain’s DNS records. The SPF protocol allows server administrators to describe their email servers in their DNS records. By comparing the headers of the email with the SPF value, the receiving host can verify that the email is originating from the legitimate mail server for that domain. This prevents spammers from sending forged emails. <strong>ePrism</strong>’s SPF actions only apply to incoming mail messages that have failed an SPF check, which means that the email message does not match the corresponding published SPF record. If a specific mail server does not have an existing SPF record then the message is processed normally. It is possible, however, that administrators may misconfigure their DNS SPF records, resulting in false positives and legitimate hosts being blocked from sending you mail. SPF is an emerging anti-fraud and anti-phishing technology that is designed primarily as a mechanism to prevent forged emails rather than an anti-spam measure. It is dependent on network administrators publishing their legitimate email servers in their DNS records and ensuring these records are properly configured. St. Bernard encourages customers that use SPF in their DNS infrastructure to review their own SPF records to ensure they are accurate. Note: St. Bernard recommends that if you enable SPF, you should set the action to modify the subject header rather than reject the message to ensure that false positives due to sending system misconfiguration are not completely rejected. Select Mail Delivery -> SPF on the menu to configure Sender Policy Framework settings: • Enable SPF — Select the check box to enable SPF verification. The SPF action will only apply to messages that fail an SPF check. 88
SPF (Sender Policy Framework) • Strip incoming SPF headers — This option removes any "Received-SPF" header from incoming messages. Spammers may attach their own forged SPF headers to create the impression that the email is from a legitimate source • Add outgoing SPF header — This option adds an SPF header to the outgoing message. • Action — Specify one of the following actions: Just log: An entry is made in the log, and no other action is taken. Modify Subject Header: The text specified in Action Data will be inserted into the message subject line. Add header: An "X" mail header will be added as specified in the Action Data. Redirect to: The message will be delivered to the mail address specified in Action Data. Reject mail: The mail will not be accepted, and the connecting mail server is forced to return it. BCC: The message will be copied to the mail address specified in Action Data. • Action data — Depending on the specified action: Modify Subject Header: The specified text will be inserted into the subject line, such as [SPF]. Add header: A message header will be added with the specified text, such as [SPF]. Redirect to: Send the message to a mailbox such as spam@example.com. You can also specify a domain such as spam.example.com. 89
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M1000, M2000, M3000 ePrism User Gui
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Malformed Messages 83 Attachment Co
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APPENDIX A Using the ePrism System
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• ePrism Installation Guide — P
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ePrism Overview What’s New in ePr
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ePrism Overview ePrism Overview ePr
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ePrism Overview Virus Scanning The
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ePrism Overview HALO (High Availabi
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ePrism Overview display this inform
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ePrism Overview ePrism on the DMZ D
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ePrism Overview Malformed Content,
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ePrism Overview 22
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Administering ePrism Connecting to
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Administering ePrism • Anti-Virus
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Administering ePrism Configuring th
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Administering ePrism 4. Select the
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Administering ePrism Customizing th
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Configuring Mail Delivery Settings
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Configuring Mail Delivery Settings
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Page 134 and 135: Anti-Spam Features Troubleshooting
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Page 138 and 139: Anti-Spam Features Spam Quarantine
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Anti-Spam Features • Allow releas
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Anti-Spam Features In User Accounts
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Anti-Spam Features • Reject on un
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User Accounts and Remote Authentica
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Secure WebMail and ePrism Mail Clie
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Policy Management Policy Overview e
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Policy Management Anti-Spam Scenari
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Policy Management Enter the domain
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Policy Management Step 5: Configure
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Policy Management 176
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System Management System Status and
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System Management Current Admin and
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System Management Quarantine Manage
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System Management License Managemen
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System Management Software Updates
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System Management Reboot and Shutdo
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System Management Starting a Backup
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System Management • Backup system
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System Management Restoring from Ba
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System Management You can view the
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System Management Configuring Centr
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System Management Using the Managem
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System Management Problem Reporting
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HALO (High Availability and Load Op
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Reporting Viewing and Generating Re
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Reporting Reports that have been pr
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Reporting Click the Generate Now bu
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Reporting TABLE 1. Reporting Field
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Reporting Creating Report Filters Y
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Reporting Search Search for specifi
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Reporting Viewing the System Histor
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Reporting TABLE 2. System Database
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Reporting Disabling Reporting The r
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Monitoring System Activity Activity
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Monitoring System Activity System L
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Monitoring System Activity Configur
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Monitoring System Activity Configur
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Monitoring System Activity Alarms e
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Monitoring System Activity System A
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Troubleshooting Mail Delivery Troub
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Troubleshooting Mail Delivery Exami
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Troubleshooting Mail Delivery TABLE
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Troubleshooting Mail Delivery Netwo
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Troubleshooting Mail Delivery SMTP
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Troubleshooting Mail Delivery Trace
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Troubleshooting Mail Delivery Displ
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Using the ePrism System Console Pre
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Using the ePrism System Console 268
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Restoring ePrism to Factory Default
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Message Processing Order 23. DCC (D
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Customizing Notification and Annota
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Performance Tuning Setting Default
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Performance Tuning Maximum Number o
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Performance Tuning Number of DB Pro
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Performance Tuning 282
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SNMP MIBS TABLE 1. Memory Usage and
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SNMP MIBS Alarm Objects TABLE 5. Al
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SNMP MIBS .1.11.10.2.2 = bwProducts
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SNMP MIBS .11.4.0 = systemStats.ssS
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Third Party Copyrights and Licenses
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Default Logo 32 Default Mail Relay
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Personal Quarantine Controls 161 Pi
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V Vacation Notification 154 Very Ma
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