| Count | MTA |
|---|---|
| 21131 | blocked |
| 9324 | MS Exchange |
| 8101 | qmail |
| 7349 | sendmail |
| 3948 | postfix |
| 2037 | unknown |
| 841 | Cisco |
| 724 | SmartFilter |
| 623 | XMail |
| 503 | Deepsoft WBlock |
| 423 | Exim |
| 148 | spamsniper |
| 95 | Lotus Domino |
| 92 | james |
| 82 | IceWarp |
| 73 | MailEnable |
| 63 | mdaemon |
| 61 | spambreaker |
| 58 | Deepsoft Postian |
| 51 | Mercury |
| 49 | merak |
| 46 | imoxion |
| 36 | rblsmtpd |
| 28 | hmailserver |
| 24 | eSafe |
| 16 | imail |
| 12 | barracuda |
| 9 | terrace |
| 7 | WinWebMail |
| 6 | Argosoft NT |
| 4 | TrendMicro Reputation |
| 4 | Symantec AVGate |
| 4 | Halon |
| 4 | EMailArchitect |
| 4 | CCProxy |
| 4 | Winmail |
| 3 | postoffice |
| 3 | ims |
| 3 | MailSite |
| 2 | UNIX InterMail |
| 2 | iPlanet |
| 2 | assp |
| 1 | stalker |
| 1 | SurgeSMTP |
| 1 | Code-Crafters |
| 1 | CheckPoint FW |
| 1 | AS/400 IBM SMTP |
| 1 | ucx |
| 1 | Python SMTP |
| 1 | InterScan |
| 1 | mercur |
| 56008 | TOTAL |