| Count | MTA |
|---|---|
| 5796 | postfix |
| 1514 | blocked |
| 1504 | Exim |
| 1036 | unknown |
| 695 | MS Exchange |
| 669 | mdaemon |
| 433 | qmail |
| 300 | sendmail |
| 163 | Cisco |
| 86 | rblsmtpd |
| 75 | eSafe |
| 59 | MailEnable |
| 54 | Lotus Domino |
| 44 | barracuda |
| 42 | TrendMicro Reputation |
| 36 | Kerio |
| 33 | qpsmtpd |
| 26 | IceWarp |
| 24 | Sophos |
| 20 | Mercury |
| 11 | VHCS |
| 11 | XMail |
| 9 | communigate |
| 5 | mirapoint |
| 5 | MikroTik |
| 5 | hmailserver |
| 4 | DeskNow |
| 2 | InterScan |
| 2 | SurgeSMTP |
| 2 | SonicWALL |
| 2 | Winmail |
| 2 | mailmarshal |
| 2 | stalker |
| 2 | Spamfilter ISP |
| 1 | Argosoft NT |
| 1 | CheckPoint FW |
| 1 | Cellopoint |
| 1 | spamsniper |
| 1 | XWall/Exchange |
| 1 | CCProxy |
| 1 | WinRoute |
| 1 | imail |
| 1 | merak |
| 1 | modusMail |
| 1 | PowerMTA |
| 1 | postoffice |
| 12685 | TOTAL |