| Count | MTA |
|---|---|
| 3247 | unknown |
| 922 | postfix |
| 465 | qmail |
| 408 | MS Exchange |
| 406 | Exim |
| 196 | blocked |
| 164 | mdaemon |
| 127 | sendmail |
| 59 | Cisco |
| 46 | MailEnable |
| 15 | rblsmtpd |
| 8 | Sophos |
| 6 | IceWarp |
| 6 | Kerio |
| 5 | Lotus Domino |
| 4 | qpsmtpd |
| 4 | TrendMicro Reputation |
| 3 | barracuda |
| 3 | SurgeSMTP |
| 3 | Mercury |
| 2 | eSafe |
| 2 | merak |
| 1 | XMail |
| 1 | CMailServer |
| 1 | VHCS |
| 1 | Argosoft NT |
| 1 | communigate |
| 1 | vpop3 |
| 6107 | TOTAL |