IBM AH0QXML User Guide - Page 24

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Lotus Domino 6 spam Survival Guide for IBM eServer

Here is an example of a spam information message that you can modify and

send to your users:

Dear users,

The Information Systems department is interested in reducing the amount of

unsolicited commercial e-mail (aka spam) delivered to our organization. We

would also like to find out whether spam is a concern for you, as this will

help us determine the best approach to take when configuring our systems to

reject spam.

How to Avoid Spam

The best way for us not to receive spam is to prevent our e-mail addresses

from being gathered by those that send spam. Here are some ways that you

can help:

–

Never respond in any way to unsolicited commercial e-mail. Responding can

make your address a target for more spam - this includes any “opt out”

links which are often used just to verify that yours is a valid address.

–

Avoid giving out your e-mail address on Web sites or discussions.

Consider using a personal e-mail address or a free e-mail address for

non-work-related correspondence.

–

Disregard chain letters or other spam that encourages you to send

messages to others.

–

If you send mail to several external users, consider putting the

addresses in the “bcc” field so that all of the addresses are not visible.

If you are careful and avoid having your address get on the spam lists you can

avoid having spam delivered to our organization.

Sincerely,

Your Domino Administrator

2.2

How to block spam

If spammers manage to get your users

’

addresses, you may need to select an

approach that configures your systems to block spam. As previously mentioned,

there are two major philosophies when it comes to dealing with spam. The

“

gateway

”

approach forestalls spam by rejecting it based on either content or

address origin when it reaches the organization's entry point. The

“

user

”

approach delivers all mail, even spam, and provides tools to the user so that the

user can decide what is spam and what is mail. These approaches are not

mutually exclusive, and the

“

right

”

approach depends entirely on your

organization and your users. You will want to engage some server-based spam

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 24

How to block spam, address origin when it reaches the organization's entry point.

Page 24 highlights