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Symantec 10744983 Administration Guide - Page 65

Configuring invalid recipient handling, Under Bloodhound Level, click

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Configuring email settings 65 Configuring invalid recipient handling can determine in microseconds whether a message or attachment is likely to be infected. If it determines that a file is not likely to be infected, it moves to the next file. Lower heuristic levels may miss viruses, but consume less processing power, potentially speeding incoming mail processing. Higher heuristic levels may catch more viruses, but consume more processing power, potentially slowing incoming mail processing. To set the Bloodhound Level 1 Click Settings > Virus. 2 Click the Bloodhound tab. 3 Under Bloodhound Level, click High, Medium, Low, or Off. 4 Click Save. Configuring invalid recipient handling By default, when an email message arrives addressed to your domain, but is not addressed to a valid user, Symantec Mail Security passes the message to the internal mail server. The internal mail server may either accept the message and generate a bounce message for that recipient, or the internal mail server may reject the recipient, in which case Symantec Mail Security generates a bounce message for the recipient. Upon receiving the bounce message, the sender can resend the original message with the correct address. However, messages with invalid recipients can also result from a spammer's directory harvest attack. You can drop all messages for invalid recipients using the Drop messages for invalid recipients action described below. There is a Remove invalid recipients action available on the Policies > Attacks > Directory Harvest Attacks page that only removes invalid recipients if a directory harvest attack is occurring. These two settings can be combined or enabled individually. Note: Dropping messages for invalid recipients is an extreme measure. Enabling it may prevent diagnosis of serious problems with your email configuration, so only enable it after you're sure your email system is stable. Also, if enabled, even accidentally mis-addressed messages will be dropped, and no bounce message sent. The Remove invalid recipients action available on the Policies > Attacks > Directory Harvest Attack page is a less extreme measure.

Section	Page
Symantec Mail Security Administration Guide	1
Technical Support	3
Contents	9
1. About Symantec Mail Security	15
Key features	15
New features	16
Functional overview	18
Architecture	19
Where to get more information	20
2. Configuring system settings	23
Configuring certificate settings	23
Manage certificates	24
Configuring host (Scanner) settings	25
Working with Services	26
HTTP proxies	27
SMTP Scanner settings	27
Configuring Default SMTP Settings	31
Configuring internal mail hosts	35
Testing Scanners	35
Configuring LDAP settings	36
Configure LDAP settings	37
Synchronization status information	43
Replicating data to Scanners	45
Starting and stopping replication	46
Replication status information	46
Troubleshooting replication	47
Configuring Control Center settings	48
Control Center administration	49
Control Center certificate	50
Configuring, enabling and scheduling Scanner replication	50
Control Center Settings	51
System locale	52
3. Configuring email settings	53
Configuring address masquerading	53
Importing masqueraded entries	54
Configuring aliases	55
Managing aliases	56
Importing aliases	57
Configuring local domains	58
Importing local domains and email addresses	59
Understanding spam settings	60
Configuring suspected spam	61
Choosing language identification type	61
Software acceleration	62
Configuring spam settings	62
Configuring virus settings	62
Configuring LiveUpdate	63
Excluding files from virus scanning	64
Configuring Bloodhound settings	64
Configuring invalid recipient handling	65
Configuring scanning settings	66
Configuring container settings	66
Configuring content filtering settings	67
4. Configuring email filtering	69
About email filtering	69
Notes on filtering actions	78
Multiple actions per verdict	79
Multiple group policies	81
Security risks	81
About precedence	83
Creating groups and adding members	84
Add or remove members from a group	84
Assigning filter policies to a group	87
Selecting virus policies for a group	87
Selecting spam policies for a group	89
Selecting compliance policies for a group	89
Enabling and disabling end user settings	90
Allowing or blocking email based on language	92
Managing Group Policies	92
Manage Group Policies	93
Creating virus, spam, and compliance filter policies	94
Creating virus policies	94
Creating spam policies	96
Creating compliance policies	98
Managing Email Firewall policies	107
Configuring attack recognition	107
Configuring sender groups	108
Configuring Sender Authentication	119
Managing policy resources	120
Annotating messages	120
Archiving messages	122
Configuring attachment lists	124
Configuring dictionaries	126
Adding and editing notifications	128
5. Working with Spam Quarantine	131
About Spam Quarantine	131
Delivering messages to Spam Quarantine	132
Working with messages in Spam Quarantine for administrators	132
Accessing Spam Quarantine	132
Checking for new Spam Quarantine messages	133
Administrator message list page	133
Administrator message details page	135
Searching messages	137
Configuring Spam Quarantine	140
Delivering messages to Spam Quarantine from the Scanner	140
Configuring Spam Quarantine port for incoming email	141
Configuring Spam Quarantine for administrator-only access	141
Configuring the Delete Unresolved Email setting	142
Configuring the login help	142
Configuring recipients for misidentified messages	142
Configuring the user and distribution list notification digests	143
Configuring the Spam Quarantine Expunger	149
Specifying Spam Quarantine message and size thresholds	150
Troubleshooting Spam Quarantine	150
6. Working with Suspect Virus Quarantine	157
About Suspect Virus Quarantine	157
Routing messages to Suspect Virus Quarantine	157
Accessing Suspect Virus Quarantine	158
Checking for new Suspect Virus Quarantine messages	158
Suspect Virus Quarantine messages page	158
Searching messages	160
Configuring Suspect Virus Quarantine	162
Configuring Suspect Virus Quarantine port for incoming email	162
Configuring the size for Suspect Virus Quarantine	163
7. Testing Symantec Mail Security	165
Verifying normal delivery	165
Verifying spam filtering	165
Testing antivirus filtering	166
Verifying filtering to Spam Quarantine	167
8. Configuring alerts and logs	169
About alerts	169
Configuring alerts	171
Viewing logs	171
Working with logs	172
About logs	173
Configuring logs	173
9. Working with Reports	177
About reports	177
Selecting report data to track	178
Choosing a report	178
About charts and tables	188
Setting the retention period for report data	188
Running reports	189
Saving and editing Favorite Reports	190
Running and deleting favorite reports	190
Troubleshooting report generation	191
No data available for the report type specified	191
Sender HELO domain or IP connection shows gateway information	191
Reports presented in local time of Control Center	191
By default, data are saved for one week	192
Processed message count recorded per message, not per recipient	192
Recipient count equals message count	193
Deferred or rejected messages are not counted as received	193
Reports limited to 1,000 rows	193
Printing, saving, and emailing reports	193
Print, save, or email reports	194
Scheduling reports to be emailed	194
Schedule, Edit, or Delete Reports	194
10. Administering the system	197
Getting status information	197
Overview of system information	198
Message status	198
Host details	203
LDAP Synchronization	204
Log details	204
Version Information	204
Scanner replication	205
Managing Scanners	205
Editing Scanners	205
Enabling and disabling Scanners	206
Deleting Scanners	207
Administering the system through the Control Center	208
Managing system administrators	208
Managing software licenses	209
Administering the Control Center	209
Starting and stopping the Control Center	209
Checking the Control Center error log	210
Increasing the amount of information in BrightmailLog.log	211
Starting and stopping UNIX and Windows services	213
Starting and stopping Windows services	213
Starting and stopping UNIX services	215
Periodic system maintenance	215
Backing up logs data	216
Backing up the Spam and Virus Quarantine databases	216
Maintaining adequate disk space	219
A. Integrating Symantec Mail Security with Symantec Security Information Manager	221
About Symantec Security Information Manager	221
Interpreting events in the Information Manager	222
Configuring data sources	223
Firewall events that are sent to the Information Manager	224
Definition Update events that are sent to the Information Manager	224
Message events that are sent to the Information Manager	225
Administration events that are sent to the Information Manager	226
Glossary	229

Match case Limit results 1 per page

can determine in microseconds whether a message or attachment is likely to be

infected. If it determines that a file is not likely to be infected, it moves to the next

file.

Lower heuristic levels may miss viruses, but consume less processing power,

potentially speeding incoming mail processing. Higher heuristic levels may catch

more viruses, but consume more processing power, potentially slowing incoming

mail processing.

To set the Bloodhound Level

Click

Settings > Virus

Click the

Bloodhound

tab.

Under Bloodhound Level, click

High

Medium

Low

, or

Off

Click

Save

Configuring invalid recipient handling

By default, when an email message arrives addressed to your domain, but is not

addressed to a valid user, Symantec Mail Security passes the message to the

internal mail server. The internal mail server may either accept the message and

generate a bounce message for that recipient, or the internal mail server may

reject the recipient, in which case Symantec Mail Security generates a bounce

message for the recipient. Upon receiving the bounce message, the sender can

resend the original message with the correct address. However, messages with

invalid recipients can also result from a spammer's directory harvest attack.

You can drop all messages for invalid recipients using the Drop messages for

invalid recipients action described below. There is a Remove invalid recipients

action available on the Policies > Attacks > Directory Harvest Attacks page that

only removes invalid recipients if a directory harvest attack is occurring. These

two settings can be combined or enabled individually.

Note:

Dropping messages for invalid recipients is an extreme measure. Enabling

it may prevent diagnosis of serious problems with your email configuration, so

only enable it after you're sure your email system is stable. Also, if enabled, even

accidentally mis-addressed messages will be dropped, and no bounce message

sent. The Remove invalid recipients action available on the Policies > Attacks >

Directory Harvest Attack page is a less extreme measure.

Configuring email settings

Configuring invalid recipient handling