IBM AH0QXML User Guide - Page 45

Chapter 4. Domino 6 Server anti-spam features

33

DNSBL checking tends to vary from site to site. Some sites provide their service

for free, while others charge a fee for their service. Contact your prospective

DNSBL service provider to inquire on pricing.

Listed in Table 4-1 are several commercially available DNSBL service providers.

We do not recommend one service provider over another. You should be aware

that other services are available to you and you should contact individual blacklist

providers to learn about their services and policies. We suggest you perform a

Web search on DNS Blacklist sites to obtain listings of other providers since they

may provide additional services you require.

Table 4-1

Examples of DNSBL service providers

You can specify multiple sites to query, but be aware of the potential overhead of

checking multiple databases. When utilizing multiple DNSBL sites, Domino will

perform queries to all sites until a match has been found. If the connecting host is

located in the first DNSBL site specified, the search is complete and remaining

DNSBL sites will not be queried. The more DNSBL sites you use, the longer your

queries could take.

Configuration of DNS Blacklist filters

1.

In the Administration client click the Configuration tab and expand the

Messaging section.

2.

Click Configurations.

3.

Select the configurations settings document for the server you want to

administer and click Edit Configuration.

4.

Click the tabs in the following order: Router/SMTP

→

Restrictions and

Controls

→

SMTP Inbound Controls and navigate down to DNS Blacklist

Filters.

5.

Double-click the document or click the Edit Server Configuration button to put

the document in edit mode.

Service provider

Web site URL

Spamcop

http://www.spamcop.com

Mail Abuse Prevention Systems, LLC

http://www.mail-abuse.org

The Spamhaus Project

http://www.spamhaus.org

The Open Relay Database (ORDB)

http://www.ordb.org

OsiruSoft Research & Engineering

http://www.osirusoft.org

Section	Page
Front cover	1
Contents	5
Notices	7
Trademarks	8
Preface	9
The team that wrote this redbook	9
Become a published author	11
Comments welcome	12
Chapter 1. Introduction	13
1.1 Definition of spam	14
1.2 Categorizing spam	14
Chapter 2. Preventing unwanted e-mail and spam	19
2.1 Spam avoidance techniques	20
2.1.1 Passive harvesting attacks	20
2.1.2 Avoiding harvesting	21
2.1.3 Confusing the harvesters	22
2.1.4 Inform Users	22
2.2 How to block spam	24
2.2.1 At the gateway	25
2.2.2 At the server	25
2.2.3 By the end user	26
2.2.4 Selecting the best approach	26
2.2.5 Managing the ongoing anti-spam campaign	27
2.2.6 Summary	28
Chapter 3. Domino 6 anti-spam architecture	29
3.1 The Domino messaging environment	30
3.2 Domino 6 messaging components	32
3.2.1 SMTP Listener/Server	33
3.2.2 Router	35
3.3 Domino 6 anti-spam configuration	35
3.3.1 Server configuration features	36
3.3.2 User configuration features	37
3.4 Common problems and solutions	37
Chapter 4. Domino 6 Server anti-spam features	41
4.1 How to detect spam	42
4.1.1 Examining the message properties	42
4.1.2 Separating legitimate e-mail from spam based on content	43
4.2 Controlling connections from spammers	44
4.2.1 DNS Blacklist filters	44
4.2.2 Inbound Intended Recipients Controls	48
4.2.3 Disable routing mail to groups	51
4.2.4 Inbound connection controls	53
4.2.5 Inbound sender controls	54
4.3 Controlling delivery of spam	57
4.3.1 Server mail rules	57
4.4 Controlling use of your server as a relay	66
4.4.1 Inbound relay controls	66
4.4.2 Inbound relay enforcement	71
4.5 Protecting your Domino server from active address harvesting attacks	74
4.5.1 SMTP harvesting attacks	74
4.5.2 Spam mail bombing	74
4.5.3 Direct SMTP RCPT TO harvesting	74
4.5.4 Defending against active attacks	75
Chapter 5. Using mail file rules to prevent spam	77
5.1 Distinguishing between spam and legitimate e-mail	78
5.2 Mail file rules	80
5.2.1 Setting up mail file rules	80
5.2.2 Developing anti-spam mail file rules	83
5.2.3 Viewing mail rules and the evaluation sequence	89
5.2.4 Monitoring mail file rules	90
Chapter 6. Third party anti-spam products	93
6.1 Anti-spam products for Notes and Domino	94
6.1.1 spamJam for Lotus Notes and Domino	94
6.1.2 SpamEraser for Lotus Notes and Domino 6	97
6.1.3 iQ.Suite	100
6.1.4 ScanMail for Lotus Notes with eManager	101
6.1.5 XM SpamStop	104
6.1.6 Other anti-spam products for Notes and Domino	106
6.2 Anti-spam server and gateway products and services	106
6.2.1 BrightMail Anti-Spam 4.0 from BrightMail, Inc.	106
6.2.2 ActiveState PureMessage	107
6.2.3 Trend Micro Inc. products	109
6.2.4 Other anti-spam server or gateway products and services	110
Related publications	111
IBM Redbooks	111
Referenced Web sites	111
How to get IBM Redbooks	112
IBM Redbooks collections	112
Index	113

IBM AH0QXML User Guide - Page 45

Configuration of DNS Blacklist filters, SMTP Inbound Controls and navigate down to DNS Blacklist

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