Vendor Vendor/product summary Sales model and target markets Anti-virus 
Appliance based solutions
Borderware Mxtreme 2 way filtering, support for remote email access, built in failover and replication Direct sales and partners, MX200 for small, MX400 and MX800 for mid-market and MX1000 for enterprises Kaspersky
CipherTrust IronMail 2 way filtering, supports remote email access and can act as a proxy email server 100% channel, 305 and 345 for enterprises, S-Series for SMBs Sophos, McAfee
IronPort C-Series 2 way filtering based on Brightmail and other in-house filters including their own bonded sender white-list 100% channel, C10 for small, C30 for mid-market, C60 for enterprises, good enterprise references Sophos on-board, others can be integrated
Mirapoint RazorGate 2 way filtering, use Vipul's Razor spam signatures and other techniques for detection 100% channel, 100 for small, 300 for mid-market and 450 for enterprises and ISPs Sophos
Hosted services
BlackSpider MailControl 2 way filtering, British based company, a lot of progress in the last 12 months, now looking to Europe 100% channel, also works with ISPs who re-brand MailControl, SMB to Enterprise McAfee, Symantec, Kaspersky plus their own Huntsman
Corpex ArmourPlate In-bound spam-filtering, UK/German ISP who launched this 1 year ago after developing it for their ISP customers Direct sales with some partners, SMB and ISP Sophos, F-Secure, Symantec, Kaspersky, CyberSoft
FrontBridge TrueProtect 2 way email filtering a US based company who launched in UK 1 year ago 100% channel, cross market with a focus on 2,000 plus seats Sophos, Symantec and Trend
MessageLabs Email Security System 2 way email filtering with an ant-porn option. British company with a global presence  Channel and direct plus IBM partnership. Used widely by SMBs but some impressive enterprise and government customers McAfee, F-Secure
Software based solutions
Aladdin Knowledge Systems eSafe 2 way filtering, either shipped as licenced software or a Linux based virtual server, Israeli based vendor 100% channel fulfilment, some direct touch with large accounts, SMB to enterprise  Have their own anti-virus which uses a sandbox approach
CA eTrust Secure Content Manager 2 way filtering, launched 1 year ago 100% channel, SMB to enterprise  CA eTrust Anti-Virus
ClearSwift MimeSweeper 2 way filtering, supports filtering of corporate and web mail, British based vendor 100% channel for MimeSweeper which is targeted at SMBs, also have an enterprise product sold directly Sophos, F-Secure, Symantec
CommTouch Enterprise Gateway In bound filtering, good at detecting high volume attacks, Israeli based company.  100% channel, relying in the UK on their partnership with anti-virus vendor Sybari, SMB to enterprise Sybari
FutureSoft Dynacom 2 way email filtering 100% channel plus appliance partners, SMB Any can be used, none supplied
Kaspersky Anti-Spam Kaspersky is an anti-virus vendor who has only recently entered the spam-filtering market 100% channel, SMB Kaspersky
Mayflower SpamSentinel Lotus Notes/Domino client and server-based solution, utilising hosted system for Spam checking Direct, SMB None
McAfee SpamKiller In bound filtering, based on SpamAssasin (open source) Mainly channel, SMB McAfee
NetIQ Mail Marshall Two way email filtering Direct and channel, SMB Any can be used, none supplied
Sophos PureMessage In-bound spam filtering with limited outbound policy enforcement Mainly channel, some large customers direct, mid-market and enterprise Sophos, Sybari
Surf Control Ant--spam Agent UK based web filtering company acquired us based ActiveState for spam-filtering in 2003 Direct and channel, growing channel, SMB to Enterprise, education McAfee
Symantec Brightmail Anti-Spam Symantec recently acquired Brightmail, a leading software based spam-filtering company - can filter outgoing email and but there is a separate product for policy enforcement Direct and channel, up to 50% of their business comes from appliance, hosting and ISP partners, SMB to Enterprise, Symantec
Trend ScanMail and InterScan Messaging Security Suite Two products, ScanMail for installation on Exchange or Lotus servers and Interscan for SMTP gateways. Japanese based vendor.  Mostly channel, a few direct named accounts, SMB to Enterprise Trend
This list is by no means exhaustive, for more information about any of these vendors or vendors not mentioned here please contact Quocirca