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E-mail Security Unix Mail Services David Funk Systems Administrators Computer Systems Support COE, University of Iowa.

Published byCharity Russell Modified over 9 years ago

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Presentation on theme: "E-mail Security Unix Mail Services David Funk Systems Administrators Computer Systems Support COE, University of Iowa."— Presentation transcript:

1 E-mail Security Unix Mail Services David Funk Systems Administrators Computer Systems Support COE, University of Iowa

2 Email Stats for 1 Day

3 Email Octopus IMAP server Sendmail local auth Sendmail campus gateway Sendmail external gateway Local client

4 Email Octopus  Spam filter mail external to campus  Virus filter all mail  Protect IMAP server Remote attackers cannot authenticate Process spam and virus filtering elsewhere

5 External Mail Server Sendmail external gateway milter Spam filter Virus filter

6 External Mail Server  Incoming off-campus mail Filter spam  Blocking rules  Analyze spam (SpamAssassin) Filter and discard viruses  Permitted to be slow

7 IMAP Server IMAP server Sendmail local auth milter Virus filter

8 IMAP Server  IMAP/POP mail server  Local mail client server  Only authenticated connections permitted  Filter viruses Needs to be fast  Other services, e.g., LDAP, mailtools  http://imap.engineering.uiowa.edu/mailtools

9 Campus Gateway Sendmail campus gateway milter virus filter

10 Campus Gateway  Outgoing  Incoming campus-originated mail  Filter and discard viruses Permitted to be slow

11 The Final Picture IMAP server Sendmail local auth Sendmail campus gateway Sendmail external gateway Local client Virus filter Spam filter Virus filter

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