| Count | MTA |
|---|---|
| 396 | MS Exchange |
| 194 | blocked |
| 111 | Exim |
| 94 | Cisco |
| 78 | barracuda |
| 61 | postfix |
| 44 | sendmail |
| 31 | unknown |
| 14 | mdaemon |
| 14 | MailEnable |
| 9 | TrendMicro Reputation |
| 7 | qmail |
| 4 | eSafe |
| 3 | IceWarp |
| 2 | imail |
| 2 | Mercury |
| 2 | Sun JSMS |
| 1 | merak |
| 1 | SonicWALL |
| 1 | MIMESWeeper |
| 1 | Symantec AVGate |
| 1070 | TOTAL |