| Count | MTA |
|---|---|
| 2846 | postfix |
| 1387 | MS Exchange |
| 805 | blocked |
| 675 | Exim |
| 392 | unknown |
| 309 | eSafe |
| 286 | MailEnable |
| 245 | sendmail |
| 122 | Cisco |
| 101 | mdaemon |
| 89 | barracuda |
| 68 | qmail |
| 54 | Kerio |
| 38 | communigate |
| 24 | qpsmtpd |
| 10 | Lotus Domino |
| 7 | Symantec AVGate |
| 6 | XMail |
| 6 | Argosoft NT |
| 5 | IceWarp |
| 5 | rblsmtpd |
| 4 | imail |
| 4 | hmailserver |
| 4 | TrendMicro Reputation |
| 3 | DeskNow |
| 3 | Mercury |
| 2 | mailmarshal |
| 2 | merak |
| 2 | internetanywhere |
| 2 | Softalk |
| 2 | james |
| 1 | Scalix |
| 1 | worldgroup |
| 1 | Sophos |
| 1 | Hexamail |
| 1 | spamsniper |
| 1 | SurgeSMTP |
| 1 | stalker |
| 1 | modusMail |
| 1 | vpop3 |
| 7517 | TOTAL |