| Count | MTA |
|---|---|
| 1849 | blocked |
| 1839 | Exim |
| 1035 | postfix |
| 826 | MS Exchange |
| 806 | unknown |
| 400 | MailEnable |
| 233 | sendmail |
| 213 | mdaemon |
| 186 | qmail |
| 184 | MailNow |
| 110 | Cisco |
| 92 | barracuda |
| 86 | eSafe |
| 45 | TrendMicro Reputation |
| 41 | Sophos |
| 34 | Lotus Domino |
| 21 | IceWarp |
| 18 | imail |
| 16 | mailmarshal |
| 16 | SurgeSMTP |
| 12 | qpsmtpd |
| 10 | Symantec AVGate |
| 9 | rblsmtpd |
| 8 | modusMail |
| 6 | Kerio |
| 5 | hmailserver |
| 4 | extremail |
| 4 | InterScan |
| 3 | merak |
| 3 | DeskNow |
| 2 | Scalix |
| 2 | CMailServer |
| 2 | Mercury |
| 2 | spamsniper |
| 1 | dmail |
| 1 | communigate |
| 1 | XMail |
| 1 | WinWebMail |
| 1 | Sun JSMS |
| 1 | Argosoft NT |
| 1 | PowerMTA |
| 1 | Novell Groupwise |
| 1 | MIMESWeeper |
| 1 | Hurricane |
| 1 | james |
| 8133 | TOTAL |