| Count | MTA |
|---|---|
| 1015 | postfix |
| 204 | qmail |
| 169 | blocked |
| 128 | sendmail |
| 127 | MS Exchange |
| 111 | Exim |
| 98 | Cisco |
| 74 | rblsmtpd |
| 54 | unknown |
| 44 | mdaemon |
| 19 | barracuda |
| 6 | Lotus Domino |
| 5 | MailEnable |
| 5 | XMail |
| 5 | Kerio |
| 2 | Mercury |
| 2 | communigate |
| 2 | Sophos |
| 1 | eSafe |
| 1 | qpsmtpd |
| 1 | TrendMicro Reputation |
| 1 | CCProxy |
| 1 | stalker |
| 1 | IceWarp |
| 2076 | TOTAL |