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Symantec 10744983 Administration Guide - Page 110

About Allowed and Blocked Senders Lists, Duplicate entries, Similar entries

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110 Configuring email filtering Managing Email Firewall policies Incorporate lists managed by other parties Third parties compile and manage lists of desirable or undesirable IP addresses. These lists are queried using DNS lookups. When you configure Symantec Mail Security to use a third-party sender list, Symantec Mail Security checks whether the sending mail server is on the list. If so, Symantec Mail Security performs a configured action, based on the policies in place. About Allowed and Blocked Senders Lists The following sections provide important information about the Allowed Senders Lists and Blocked Senders Lists. Duplicate entries You cannot have the exact same entry in both a Blocked Senders List and an Allowed Senders List. If an entry already exists in one list, you will receive the message "Duplicate sender - not added" when you try to add the same entry to the other list. If you'd prefer to have this entry in the other list, first delete the entry from the list that now contains it, then add it to the other list. Similar entries If you have two entries such as [email protected] and *@b.com in the two different lists, the list with higher precedence "wins." See "About precedence" on page 83. Performance impact of third party DNS lists Incorporating third party lists adds additional steps to the filtering process. For example, in a DNS list scenario, for each incoming message, the IP address of the sending mail server is queried against the list, similar to a DNS query. If the sending mail server is on the list, the mail is flagged as spam. If your mail volume is sufficiently high, running incoming mail through a third party database could hamper performance because of the requisite DNS lookups. Symantec recommends that you use the Sender Reputation Service lists instead of enabling third party lists. Reasons to allow or block senders Table 4-11 describes why you would employ lists of allowed or blocked senders and lists an example of a pattern that you as the system administrator might use to match the sender:

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

Third parties compile and manage lists of desirable or undesirable

IP addresses. These lists are queried using DNS lookups. When you

configure Symantec Mail Security to use a third-party sender list,

Symantec Mail Security checks whether the sending mail server is

on the list. If so, Symantec Mail Security performs a configured

action, based on the policies in place.

Incorporate lists

managed by other

parties

About Allowed and Blocked Senders Lists

The following sections provide important information about the Allowed Senders

Lists and Blocked Senders Lists.

Duplicate entries

You cannot have the exact same entry in both a Blocked Senders List and an

Allowed Senders List. If an entry already exists in one list, you will receive the

message “Duplicate sender - not added” when you try to add the same entry to

the other list. If you'd prefer to have this entry in the other list, first delete the

entry from the list that now contains it, then add it to the other list.

Similar entries

If you have two entries such as [email protected] and *@b.com in the two different lists,

the list with higher precedence “wins.”

See

“About precedence”

on page 83.

Performance impact of third party DNS lists

Incorporating third party lists adds additional steps to the filtering process. For

example, in a DNS list scenario, for each incoming message, the IP address of the

sending mail server is queried against the list, similar to a DNS query. If the

sending mail server is on the list, the mail is flagged as spam. If your mail volume

is sufficiently high, running incoming mail through a third party database could

hamper performance because of the requisite DNS lookups. Symantec recommends

that you use the Sender Reputation Service lists instead of enabling third party

lists.

Reasons to allow or block senders

Table 4-11

describes why you would employ lists of allowed or blocked senders

and lists an example of a pattern that you as the system administrator might use

to match the sender:

Configuring email filtering

Managing Email Firewall policies

110