| Count | MTA |
|---|---|
| 1930 | postfix |
| 697 | MS Exchange |
| 668 | blocked |
| 644 | Exim |
| 332 | unknown |
| 147 | sendmail |
| 57 | Cisco |
| 51 | mdaemon |
| 42 | qmail |
| 41 | barracuda |
| 35 | eSafe |
| 34 | MailEnable |
| 15 | Mercury |
| 13 | Lotus Domino |
| 10 | rblsmtpd |
| 10 | DeskNow |
| 8 | IceWarp |
| 7 | TrendMicro Reputation |
| 5 | Argosoft NT |
| 5 | Kerio |
| 4 | SonicWALL |
| 3 | CCProxy |
| 3 | SurgeSMTP |
| 3 | hmailserver |
| 3 | Novell Groupwise |
| 3 | spamsniper |
| 2 | Code-Crafters |
| 2 | inscitek |
| 2 | coremail |
| 2 | assp |
| 1 | XMail |
| 1 | communigate |
| 1 | CheckPoint FW |
| 1 | Sophos |
| 1 | james |
| 1 | Symantec AVGate |
| 1 | mercur |
| 4785 | TOTAL |