| Count | MTA |
|---|---|
| 2019 | postfix |
| 1337 | MS Exchange |
| 1303 | Exim |
| 534 | blocked |
| 480 | unknown |
| 105 | sendmail |
| 84 | Cisco |
| 78 | MailEnable |
| 58 | qmail |
| 53 | mdaemon |
| 43 | eSafe |
| 16 | qpsmtpd |
| 15 | Kerio |
| 14 | Sophos |
| 11 | rblsmtpd |
| 9 | Lotus Domino |
| 7 | XMail |
| 7 | Mercury |
| 7 | hmailserver |
| 5 | barracuda |
| 4 | IceWarp |
| 4 | Argosoft NT |
| 3 | XWall/Exchange |
| 3 | CMailServer |
| 3 | SonicWALL |
| 3 | TrendMicro Reputation |
| 2 | $1 |
| 2 | communigate |
| 2 | SurgeSMTP |
| 2 | merak |
| 1 | Code-Crafters |
| 1 | CheckPoint FW |
| 1 | DeskNow |
| 1 | vmsmx |
| 1 | vpop3 |
| 1 | iPlanet |
| 6219 | TOTAL |