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Sun One IMAP & Microsoft Exchange Coexistence

Sun One IMAP & Microsoft Exchange Coexistence . Dan Oberst Princeton University CSG 9/21/04. Central Mail Services. Directory “White Pages” service Flat address space userid@princeton.edu is unique Maps to address on IMAP or Exchange Users can also deliver to other service(s)

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Sun One IMAP & Microsoft Exchange Coexistence

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  1. Sun One IMAP & Microsoft ExchangeCoexistence Dan Oberst Princeton University CSG 9/21/04

  2. Dan Oberst, CSG

  3. Central Mail Services • Directory “White Pages” service • Flat address space • userid@princeton.edu is unique • Maps to address on IMAP or Exchange • Users can also deliver to other service(s) • Inbound/outbound SMTP delivery services • Listserv – manual and automatic lists • Virus & Spam filtering Dan Oberst, CSG

  4. Virus Protection • Symantec Mail Security for SMTP Gateways • On inbound SMPT server and listserver • Virus updates every 2 hours • Strip .hta, .mp3, .pif, .scr, .exe • .zip or others when new virus appears • More extensive set stripped on listserver • Viruses replaced by “DELETED0.TXT” • Looking to reject at SMTP with 550 Dan Oberst, CSG

  5. Spam Filtering • SpamAssassin tags all inbound messages • “DELETED0.TXT” gets high score • Delivers mail to target email system • Handed by server or client rules • Users can “tune” selectivity • Even when deleted, backups may be retained • No individual safe/block lists Dan Oberst, CSG

  6. Central IMAP Service • In production since 1988 •   • 18,000 accounts • 12,000-16,000 active • 10,000 individuals • 5,000-6,000 active connections • 450,000 messages/day (~40% spam) • Faculty/staff (55 MB) ; students (20 MB) • ~ 2 FTE staff Dan Oberst, CSG

  7. IMAP Speeds&Feeds • LDAP: Sun e450, 2x480r, 280r, e250 • Mail Multiplexor: 2xSun 280r • IMAP: 2xSun e4500/5500v880 • Disk: 1.5 TB Hitachi 9200 SAN (mirrored) • Inbound SMTP: 2xSun 480R • Outbound SMTP: 3xSun e250 • Unauthenticated SMTP: Sun e250 Dan Oberst, CSG

  8. IMAP: Viruses & Spam • SpamAssassin & Norton AV for Gateways • inbound mail only • Server-side filters redirect to spam folder • Opt-in (~3,000 takers) Dan Oberst, CSG

  9. Exchange • In production since 2002 • Exchange 2000  2003 (Fall ’04) • ~1,000 accounts • 5 major departments • Administrative users (of ~2,500 total) • ~50,000 messages/day • ~1+ FTE Staff • Fee-based: $7.50/mailbox/month (55 MB) Dan Oberst, CSG

  10. Exchange Speeds&Feeds • Exchange: 2x Dell PowerEdge 6550 • Disk: SCSI Dell PowerVault 220 (800 GB) • DoubleTake - 1 minute snapshots on NAS • OWA: 2x Dell PowerEdge 6550 • AD: 3x Dell PowerEdge 6550 • Blackberry Server: Dell PowerEdge 6450 Dan Oberst, CSG

  11. Exchange Viruses & Spam • Clients set Rules to filter spam • Reads SpamAssassin headers • Symantec Mail Security 4.5 for Exchange • Scans mail store for viruses that slip through • Performance issues during peak load Dan Oberst, CSG

  12. Blackberry Support • Computer Science were earlier adopters • “Throw-away” Exchange service; ~12 users • Central Support since late 2003 • Several vocal departments requested it (Washington Office) • Became “device of choice” among administration • Ease of use & integration • “It just works” • Fee-based: $160 setup; $10/mo; • +device & service costs • Grown to over 50 users Dan Oberst, CSG

  13. Blackberry Users By Office Dan Oberst, CSG

  14. Other Handheld Support • Informal poll of computer support staff: • ~70 devices with some integration • Half desktop sychronization • 25% WiFi • 25% WAN (Mobitext, GSM, etc.) • Investment Company (Princo) big Good users • Authenticated SMTP/Exchange-IMAP • Problem for older devices Dan Oberst, CSG

  15. Futures • Spam • Growing problem • 40% of mail; steady percent, but growing volume • Processing and storage • Users need to remember to delete • Deleted mail stays around for 90 days • Evaluating email firewalls • Reject well-known spam sites/SPF/RBL • Quarantine and expire spam • Integrate with anti-virus • Software (Proofpoint) vs. appliance (Barracuda) Dan Oberst, CSG

  16. Future Issues • Calendaring Dilemma • Residual OnTime users • End of life product • Exchange requires email conversion, $ • Obstacles to more 9’s (more important than phone) • Successive RAID5 disk failures • Software problems • Sticker-shock at full redundancy • Increasing complexity=more points of failure • Growing demands: cycles, storage, services Dan Oberst, CSG

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