SLIDE 1
Mail Abuse
- S. Moonesamy
Eland Systems
sm+afrinic@elandsys.com
AfriN AfriNIC 11 IC 11
No Novemb ember er 200 2009
1
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How do we stop spam
AfriNIC 11 - Mail Abuse
Mail Abuse S. Moonesamy Eland Systems sm+afrinic@elandsys.com 1 - - PowerPoint PPT Presentation
Mail Abuse S. Moonesamy Eland Systems sm+afrinic@elandsys.com 1 - - PowerPoint PPT Presentation
AfriN AfriNIC 11 IC 11 No Novemb ember er 200 2009 Mail Abuse S. Moonesamy Eland Systems sm+afrinic@elandsys.com 1 How do we stop spam No instant solution Social problem AfriNIC 11 - Mail Abuse 2 How we read an email message
SLIDE 2
SLIDE 3
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How we read an email message depends on the context
AfriNIC 11 - Mail Abuse
If I send an email to all the people attending this meeting, is it spam? If If I send a personal email to each of you, is it spam? If a person I do not know read these slides on a web site and sends me an invitation to join a social network, is it spam?
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Senders
AfriNIC 11 - Mail Abuse
Is your network sending out spam? Can you identify the computer sending out spam?
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What makes a good sender
AfriNIC 11 - Mail Abuse
Accurate information in WHOIS to identify the point of contact Accurate information in AfriNIC Whois database if the IP address block has been delegated to your organisation Forward and reverse DNS match Correct hostname (FQDN) for the SMTP EHLO
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What makes a good sender
AfriNIC 11 - Mail Abuse
Respond to abuse complaints My email is important. Why do you block me? Opt-In v/s Opt-Out
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Receivers
AfriNIC 11 - Mail Abuse
Spam Backscatter Too many SMTP connections
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AfriNIC 11 - Mail Abuse
Phishing
Mail abuse
Unsolicited commercial mail (UCE) Malware
SLIDE 9
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AfriNIC 11 - Mail Abuse
Antispam Techniques
DNS Blacklist (DNSBL) Greylisting RFC compliance Reverse DNS checks Callback verification Challenge/response systems Content filtering
SLIDE 10
Mail Abuse
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Thank hank you
- u
AfriNIC 11 - Mail Abuse