| Count | MTA |
|---|---|
| 62172 | blocked |
| 8577 | postfix |
| 7535 | sendmail |
| 7397 | Cellopoint |
| 5057 | MS Exchange |
| 4767 | unknown |
| 2590 | RaidenMAILD |
| 896 | mdaemon |
| 550 | qmail |
| 461 | Cisco |
| 407 | MailEnable |
| 393 | Exim |
| 195 | Lotus Domino |
| 165 | XMail |
| 110 | TrendMicro Reputation |
| 95 | barracuda |
| 68 | merak |
| 50 | Argosoft NT |
| 48 | CheckPoint FW |
| 47 | hmailserver |
| 42 | Winmail |
| 41 | MIMESWeeper |
| 36 | Kerio |
| 31 | IceWarp |
| 26 | imail |
| 22 | eSafe |
| 21 | Mercury |
| 20 | Sophos |
| 17 | mirapoint |
| 17 | InterScan |
| 12 | CMailServer |
| 11 | rblsmtpd |
| 10 | communigate |
| 9 | Code-Crafters |
| 9 | qpsmtpd |
| 8 | CCProxy |
| 6 | Symantec AVGate |
| 5 | SurgeSMTP |
| 5 | WinWebMail |
| 5 | postoffice |
| 4 | james |
| 3 | coremail |
| 3 | DeskNow |
| 3 | vpop3 |
| 3 | $1 |
| 3 | Sun JSMS |
| 2 | Novell Groupwise |
| 2 | XWall/Exchange |
| 2 | stalker |
| 1 | ntmail |
| 1 | Spamfilter ISP |
| 1 | netscape |
| 1 | Windows Floosietek FTGate |
| 1 | AS/400 IBM SMTP |
| 1 | Net::SMTP::Server |
| 1 | spamsniper |
| 101965 | TOTAL |