| Count | MTA |
|---|---|
| 10728 | postfix |
| 6847 | blocked |
| 4691 | unknown |
| 2524 | MS Exchange |
| 2488 | MailEnable |
| 1861 | Exim |
| 1609 | sendmail |
| 911 | PowerMTA |
| 836 | rblsmtpd |
| 806 | qmail |
| 758 | Cisco |
| 363 | mdaemon |
| 316 | PostMaster Enterprise |
| 135 | barracuda |
| 126 | TrendMicro Reputation |
| 111 | eSafe |
| 73 | Lotus Domino |
| 36 | Kerio |
| 23 | IceWarp |
| 21 | SonicWALL |
| 17 | Sophos |
| 16 | Mercury |
| 14 | qpsmtpd |
| 13 | vpop3 |
| 9 | SurgeSMTP |
| 8 | imail |
| 7 | Symantec AVGate |
| 7 | james |
| 7 | Scalix |
| 7 | CCProxy |
| 7 | merak |
| 6 | XWall/Exchange |
| 4 | XMail |
| 4 | Sun JSMS |
| 3 | hmailserver |
| 3 | Code-Crafters |
| 3 | spamsniper |
| 3 | CheckPoint FW |
| 3 | Argosoft NT |
| 2 | EMailArchitect |
| 2 | coremail |
| 2 | VisNetic |
| 2 | communigate |
| 2 | Mailtraq |
| 2 | InterScan |
| 2 | Eudora |
| 1 | CMailServer |
| 1 | Winmail |
| 1 | UCEPROTECT |
| 1 | Spamfilter ISP |
| 1 | Softalk |
| 1 | Python SMTP |
| 1 | firstclass |
| 1 | Novonyx |
| 1 | Net::SMTP::Server |
| 1 | mailmarshal |
| 1 | Lyris |
| 1 | DeskNow |
| 35430 | TOTAL |