| Count | MTA |
|---|---|
| 1417 | postfix |
| 1106 | unknown |
| 633 | Exim |
| 462 | MS Exchange |
| 371 | blocked |
| 110 | qmail |
| 97 | mdaemon |
| 80 | eSafe |
| 59 | Lotus Domino |
| 51 | sendmail |
| 43 | Cisco |
| 42 | Sophos |
| 41 | communigate |
| 36 | MailEnable |
| 31 | barracuda |
| 27 | qpsmtpd |
| 22 | TrendMicro Reputation |
| 16 | rblsmtpd |
| 15 | Kerio |
| 14 | XMail |
| 9 | mailmarshal |
| 7 | IceWarp |
| 5 | Mercury |
| 4 | SonicWALL |
| 4 | Hexamail |
| 3 | inscitek |
| 3 | hmailserver |
| 3 | RaidenMAILD |
| 3 | Windows NAI WebShield |
| 3 | DeskNow |
| 2 | SurgeSMTP |
| 2 | merak |
| 1 | Scalix |
| 1 | coremail |
| 1 | firstclass |
| 1 | james |
| 1 | XWall/Exchange |
| 1 | Novell Groupwise |
| 1 | InterScan |
| 1 | Argosoft NT |
| 1 | spamsniper |
| 4730 | TOTAL |