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E-mail Technical Coordinators Meeting

E-mail Technical Coordinators Meeting. Steve Siirila May 11, 2005. Sober Virus Fun Facts. 14.4 million messages blocked 5/2-5/9 (typically averages 2 million) 19.7 million rejected due to unknown user (typically averages 600,000)

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E-mail Technical Coordinators Meeting

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  1. E-mail Technical Coordinators Meeting Steve Siirila May 11, 2005

  2. Sober Virus Fun Facts • 14.4 million messages blocked 5/2-5/9 (typically averages 2 million) • 19.7 million rejected due to unknown user (typically averages 600,000) • 442,505 messages detected as viruses during same period (typically 15,000) • 30,000+ bounces to common email addresses (e.g. hostmaster, webmaster) • 145,000 rejected originator addresses

  3. Email Server Performance • Running at capacity on all servers over the last few weeks (virus bounces, very large mailboxes, SSL activity increased, growth) • A handful of accounts were suspended due to excessive resource usage (> 4GB transferred/day) – many more received warning letters only • Delayed email for a few users on premium interactive server (garnet) due to virus bounces

  4. Hardware Upgrades • Email server hardware will be upgraded over the summer • Completed upgrade of www.umn.edu servers from 6 Netra X1 to 3 V440s • Completed upgrade of front-end X.500 servers from 6 Netra X1 to 3 V440s

  5. Spam/Virus Filtering • Planned enhancements: • Auto-whitelisting of hosts with mismatched reverse DNS configuration • Blocked mail reporting option • Demo • NDN blocking option (for accounts which never send email)

  6. Record MTA Statistics • 1,606,810 unique IP addresses attempted mail delivery between 5/2 and 5/9 (typically 600,000/week) • 317,535 addresses seen on 5/3 alone • Nearly 20,000,000 block database entries as of 5/9 (previous high was about 7,000,000)

  7. Departmental MTA Registration • MTAs and other devices which are using the relay.tc.umn.edu service must register to guarantee uninterrupted service • Send IP address, type of device, and contact information to isgroup@umn.edu • As of 5/10, 74 IP addresses have been registered by 18 different departments • Cannot be used from dynamic IP addresses!

  8. Phase-out of clear-text passwords • No general mailings have gone out since last month • Mailings to technical coordinators are now in progress • Non-SSL autoresponder now available • Checks current outgoing SMTP settings • Checks for recent non-SSL IMAP and POP • Mail to: ssl-test@umn.edu

  9. TELNET Usage • 89 unique UMN IP addresses connect successfully per day on average • 50% of connections are from dialups • Remainder are primarily Etherjack • Users must switch to an SSH client such as putty (Windows), MacSSH (MacOS 9), or ssh (MacOS X)

  10. UMCal • Beta testing version 10g within the next month • UMCal now has over 5,000 users

  11. Steve Siirila sfs@umn.edu 612-626-0244 ‘Till next month…

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