| Count | MTA |
|---|---|
| 11463 | postfix |
| 8486 | unknown |
| 6820 | Exim |
| 3821 | MS Exchange |
| 3013 | blocked |
| 2350 | sendmail |
| 1248 | qmail |
| 733 | MailEnable |
| 577 | mdaemon |
| 367 | barracuda |
| 302 | Cisco |
| 286 | WinWebMail |
| 254 | rblsmtpd |
| 226 | eSafe |
| 104 | IceWarp |
| 100 | Winmail |
| 95 | Lotus Domino |
| 94 | Sophos |
| 76 | qpsmtpd |
| 69 | Kerio |
| 57 | XMail |
| 56 | TrendMicro Reputation |
| 51 | imail |
| 40 | RaidenMAILD |
| 38 | communigate |
| 38 | CMailServer |
| 37 | coremail |
| 36 | Argosoft NT |
| 30 | merak |
| 28 | james |
| 16 | DeskNow |
| 12 | postoffice |
| 12 | CCProxy |
| 12 | PowerMTA |
| 11 | EMailArchitect |
| 10 | hmailserver |
| 10 | Symantec AVGate |
| 8 | SonicWALL |
| 6 | Mercury |
| 6 | mirapoint |
| 5 | firstclass |
| 5 | stalker |
| 4 | Lyris |
| 4 | assp |
| 4 | SurgeSMTP |
| 4 | InterScan |
| 4 | Scalix |
| 4 | Cellopoint |
| 4 | vpop3 |
| 3 | MIMESWeeper |
| 3 | Sun JSMS |
| 3 | UNIX InterMail |
| 3 | XWall/Exchange |
| 2 | Windows NAI WebShield |
| 2 | mailmarshal |
| 2 | Novell Groupwise |
| 2 | Halon |
| 2 | Eudora |
| 2 | waurkmail |
| 2 | CheckPoint FW |
| 1 | $1 |
| 1 | mailmax |
| 1 | UNIX/Windows Lotus SMTP MTA |
| 1 | Spamfilter ISP |
| 1 | mercur |
| 1 | Softalk |
| 1 | Python SMTP |
| 1 | Code-Crafters |
| 1 | MuseMail |
| 1 | Mailtraq |
| 1 | raptor |
| 1 | Wildcat |
| 1 | iPlanet |
| 1 | VisNetic |
| 1 | inscitek |
| 1 | interchange |
| 1 | VHCS |
| 41079 | TOTAL |