| Count | MTA |
|---|---|
| 19636 | postfix |
| 13340 | blocked |
| 5719 | MS Exchange |
| 4565 | Exim |
| 3670 | unknown |
| 2639 | sendmail |
| 1257 | qmail |
| 655 | Kerio |
| 592 | IceWarp |
| 317 | Cisco |
| 203 | MailEnable |
| 177 | rblsmtpd |
| 85 | barracuda |
| 74 | XMail |
| 70 | mdaemon |
| 48 | eSafe |
| 42 | Lotus Domino |
| 36 | qpsmtpd |
| 30 | Mercury |
| 24 | communigate |
| 19 | XWall/Exchange |
| 15 | Novell Groupwise |
| 13 | modusMail |
| 11 | hmailserver |
| 10 | TrendMicro Reputation |
| 9 | Code-Crafters |
| 9 | WinRoute |
| 9 | merak |
| 6 | Symantec AVGate |
| 6 | DeskNow |
| 4 | Scalix |
| 4 | VHCS |
| 3 | CheckPoint FW |
| 3 | mailmarshal |
| 3 | Argosoft NT |
| 3 | MikroTik |
| 3 | stalker |
| 2 | SonicWALL |
| 2 | Windows NAI WebShield |
| 2 | Lotus Notes |
| 2 | Hexamail |
| 2 | SurgeSMTP |
| 1 | Sophos |
| 1 | Softalk |
| 1 | Eserv |
| 1 | UserGate |
| 1 | Eudora |
| 53324 | TOTAL |