| Count | MTA |
|---|---|
| 5016 | MS Exchange |
| 3424 | Exim |
| 2983 | postfix |
| 1675 | blocked |
| 1356 | MailEnable |
| 507 | unknown |
| 311 | qmail |
| 167 | sendmail |
| 31 | mdaemon |
| 29 | Kerio |
| 22 | Cisco |
| 22 | IceWarp |
| 12 | TrendMicro Reputation |
| 11 | rblsmtpd |
| 10 | merak |
| 7 | Spamfilter ISP |
| 7 | qpsmtpd |
| 7 | eSafe |
| 6 | Argosoft NT |
| 6 | james |
| 5 | barracuda |
| 4 | Mercury |
| 3 | CheckPoint FW |
| 3 | Symantec AVGate |
| 3 | Winmail |
| 2 | XMail |
| 2 | communigate |
| 2 | SMTPBeamer |
| 2 | MailSite |
| 2 | Lotus Domino |
| 1 | mailmarshal |
| 1 | Sun JSMS |
| 1 | SonicWALL |
| 1 | mercur |
| 1 | spamsniper |
| 1 | SurgeSMTP |
| 1 | stalker |
| 1 | XWall/Exchange |
| 1 | Code-Crafters |
| 1 | iPlanet |
| 1 | imail |
| 1 | hmailserver |
| 15649 | TOTAL |