| Count | MTA |
|---|---|
| 348 | postfix |
| 224 | MS Exchange |
| 217 | blocked |
| 102 | sendmail |
| 57 | unknown |
| 46 | Exim |
| 24 | Cisco |
| 21 | qmail |
| 16 | eSafe |
| 15 | mdaemon |
| 12 | Kerio |
| 7 | TrendMicro Reputation |
| 6 | qpsmtpd |
| 6 | MailEnable |
| 6 | rblsmtpd |
| 5 | communigate |
| 3 | Argosoft NT |
| 3 | IceWarp |
| 2 | Lotus Domino |
| 2 | Sophos |
| 1 | hmailserver |
| 1 | merak |
| 1 | SonicWALL |
| 1 | Scalix |
| 1 | Mercury |
| 1 | MIMESWeeper |
| 1 | barracuda |
| 1 | InterScan |
| 1 | Symantec AVGate |
| 1131 | TOTAL |