| Count | MTA |
|---|---|
| 7081 | MS Exchange |
| 6185 | postfix |
| 3918 | blocked |
| 2955 | Exim |
| 2910 | qmail |
| 1237 | unknown |
| 1215 | sendmail |
| 984 | eSafe |
| 503 | MailEnable |
| 352 | barracuda |
| 281 | Kerio |
| 224 | mdaemon |
| 192 | Cisco |
| 148 | PowerMTA |
| 100 | rblsmtpd |
| 63 | IceWarp |
| 58 | mailmarshal |
| 55 | TrendMicro Reputation |
| 50 | qpsmtpd |
| 48 | SonicWALL |
| 37 | Lotus Domino |
| 22 | Sophos |
| 17 | imail |
| 16 | james |
| 11 | XMail |
| 11 | hmailserver |
| 10 | Hexamail |
| 8 | Argosoft NT |
| 7 | communigate |
| 7 | Mercury |
| 7 | XWall/Exchange |
| 6 | stalker |
| 4 | smoothwall |
| 3 | Eudora |
| 3 | Lyris |
| 3 | SurgeSMTP |
| 3 | David |
| 2 | mercur |
| 2 | firstclass |
| 2 | Winmail |
| 1 | MailSite |
| 1 | merak |
| 1 | modusMail |
| 1 | Code-Crafters |
| 1 | MailMax |
| 1 | DefenderMX |
| 1 | F-Secure |
| 1 | WinRoute |
| 1 | Symantec AVGate |
| 1 | EMailArchitect |
| 1 | appleshare |
| 1 | Spamfilter ISP |
| 1 | Scalix |
| 1 | SMTPBeamer |
| 1 | Novell Groupwise |
| 1 | Mailtraq |
| 28756 | TOTAL |