| Count | MTA |
|---|---|
| 3732 | postfix |
| 3616 | Exim |
| 3471 | unknown |
| 3357 | dmail |
| 1603 | MS Exchange |
| 1271 | blocked |
| 740 | qmail |
| 694 | MailEnable |
| 429 | sendmail |
| 318 | rblsmtpd |
| 184 | mdaemon |
| 144 | Cisco |
| 86 | barracuda |
| 76 | SurgeSMTP |
| 71 | eSafe |
| 57 | Lotus Domino |
| 44 | IceWarp |
| 39 | qpsmtpd |
| 33 | Sophos |
| 30 | TrendMicro Reputation |
| 20 | Kerio |
| 17 | PowerMTA |
| 16 | XMail |
| 15 | imail |
| 13 | hmailserver |
| 10 | Winmail |
| 9 | mailmarshal |
| 8 | MailNow |
| 7 | james |
| 7 | mirapoint |
| 6 | communigate |
| 5 | EMailArchitect |
| 4 | Symantec AVGate |
| 3 | Mercury |
| 3 | SonicWALL |
| 3 | merak |
| 3 | InterScan |
| 3 | Argosoft NT |
| 2 | Windows NAI WebShield |
| 2 | coremail |
| 2 | Python SMTP |
| 1 | inscitek |
| 1 | Eudora |
| 1 | spamsniper |
| 1 | vpop3 |
| 1 | XWall/Exchange |
| 20158 | TOTAL |