| Count | MTA |
|---|---|
| 1425 | Exim |
| 1414 | postfix |
| 602 | blocked |
| 470 | MS Exchange |
| 343 | unknown |
| 101 | sendmail |
| 67 | eSafe |
| 56 | barracuda |
| 45 | Cisco |
| 35 | qmail |
| 35 | Kerio |
| 12 | mdaemon |
| 9 | TrendMicro Reputation |
| 9 | MailEnable |
| 4 | IceWarp |
| 4 | imail |
| 3 | Lotus Domino |
| 3 | SurgeSMTP |
| 2 | rblsmtpd |
| 2 | james |
| 2 | mailmarshal |
| 1 | Argosoft NT |
| 1 | David |
| 1 | XMail |
| 1 | Sophos |
| 1 | Python SMTP |
| 1 | Novell Groupwise |
| 1 | modusMail |
| 1 | Mercury |
| 4651 | TOTAL |