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Sun One IMAP & Microsoft Exchange Coexistence Dan Oberst Princeton University CSG 9/21/04.

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Presentation on theme: "Sun One IMAP & Microsoft Exchange Coexistence Dan Oberst Princeton University CSG 9/21/04."— Presentation transcript:

1 Sun One IMAP & Microsoft Exchange Coexistence Dan Oberst Princeton University CSG 9/21/04

2 Dan Oberst, CSG 9/21/04

3 Dan Oberst, CSG 9/21/04 Central Mail Services Directory “White Pages” service Flat address space  userid@princeton.edu is unique userid@princeton.edu  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

4 Dan Oberst, CSG 9/21/04 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

5 Dan Oberst, CSG 9/21/04 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

6 Dan Oberst, CSG 9/21/04 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

7 Dan Oberst, CSG 9/21/04 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

8 Dan Oberst, CSG 9/21/04 IMAP: Viruses & Spam SpamAssassin & Norton AV for Gateways  inbound mail only Server-side filters redirect to spam folder  Opt-in (~3,000 takers)

9 Dan Oberst, CSG 9/21/04 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)

10 Dan Oberst, CSG 9/21/04 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

11 Dan Oberst, CSG 9/21/04 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

12 Dan Oberst, CSG 9/21/04 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

13 Dan Oberst, CSG 9/21/04 Blackberry Users By Office Department or Office Woodrow Wilson School20 Nassau Hall (Senior Administration)11 Office of Information Technology6 Human Resources4 Art Museum3 Athletics3 Communications2 Misc.7 Total56

14 Dan Oberst, CSG 9/21/04 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

15 Dan Oberst, CSG 9/21/04 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)

16 Dan Oberst, CSG 9/21/04 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


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