| Count | MTA |
|---|---|
| 7286 | Exim |
| 2809 | mdaemon |
| 2386 | postfix |
| 1076 | unknown |
| 815 | MailEnable |
| 770 | MS Exchange |
| 594 | qmail |
| 464 | IceWarp |
| 462 | blocked |
| 190 | Cisco |
| 159 | Kerio |
| 122 | sendmail |
| 62 | barracuda |
| 26 | Lotus Domino |
| 18 | eSafe |
| 9 | communigate |
| 8 | TrendMicro Reputation |
| 7 | RaidenMAILD |
| 7 | CCProxy |
| 7 | qpsmtpd |
| 7 | Sophos |
| 6 | rblsmtpd |
| 5 | Winmail |
| 5 | vpop3 |
| 4 | Cellopoint |
| 4 | Mercury |
| 4 | imail |
| 4 | merak |
| 2 | CheckPoint FW |
| 2 | hmailserver |
| 1 | SurgeSMTP |
| 1 | David |
| 1 | Sun JSMS |
| 1 | MIMESWeeper |
| 1 | mirapoint |
| 1 | SonicWALL |
| 1 | SmartFilter |
| 1 | PowerMTA |
| 1 | Net::SMTP::Server |
| 1 | stalker |
| 1 | XMail |
| 1 | Symantec AVGate |
| 1 | WinWebMail |
| 1 | coremail |
| 17334 | TOTAL |