| Count | MTA |
|---|---|
| 5610 | postfix |
| 4706 | Exim |
| 2601 | unknown |
| 2499 | blocked |
| 1757 | barracuda |
| 1747 | MS Exchange |
| 669 | mdaemon |
| 537 | sendmail |
| 430 | qmail |
| 240 | MailEnable |
| 182 | Cisco |
| 96 | eSafe |
| 84 | TrendMicro Reputation |
| 80 | IceWarp |
| 76 | qpsmtpd |
| 42 | Kerio |
| 30 | rblsmtpd |
| 27 | Lotus Domino |
| 23 | Argosoft NT |
| 17 | hmailserver |
| 13 | imail |
| 11 | Sophos |
| 11 | Mercury |
| 7 | UNIX Zmailer |
| 6 | merak |
| 4 | DeskNow |
| 3 | spamsniper |
| 3 | Novell Groupwise |
| 3 | XMail |
| 3 | firstclass |
| 3 | coremail |
| 2 | CheckPoint FW |
| 2 | SonicWALL |
| 2 | Symantec AVGate |
| 2 | communigate |
| 2 | InterScan |
| 1 | MailSite |
| 1 | james |
| 1 | Windows NAI WebShield |
| 1 | WinRoute |
| 1 | Python SMTP |
| 1 | VHCS |
| 1 | Sun JSMS |
| 1 | Spamfilter ISP |
| 1 | Softalk |
| 1 | SMTPBeamer |
| 1 | MIMESWeeper |
| 21541 | TOTAL |