| Count | MTA |
|---|---|
| 5540 | Exim |
| 2857 | postfix |
| 1383 | blocked |
| 1053 | MS Exchange |
| 798 | sendmail |
| 662 | unknown |
| 660 | MailEnable |
| 285 | qmail |
| 153 | Cisco |
| 114 | Kerio |
| 94 | TrendMicro Reputation |
| 81 | IceWarp |
| 57 | mdaemon |
| 57 | Lotus Domino |
| 41 | barracuda |
| 34 | eSafe |
| 25 | merak |
| 23 | imail |
| 17 | Sophos |
| 15 | communigate |
| 15 | Winmail |
| 12 | rblsmtpd |
| 11 | stalker |
| 10 | Argosoft NT |
| 9 | qpsmtpd |
| 9 | Mercury |
| 8 | XMail |
| 6 | $1 |
| 5 | WinWebMail |
| 4 | SonicWALL |
| 4 | hmailserver |
| 3 | InterScan |
| 3 | Sun JSMS |
| 3 | assp |
| 2 | SurgeSMTP |
| 2 | james |
| 2 | coremail |
| 2 | vpop3 |
| 2 | Code-Crafters |
| 2 | spamsniper |
| 1 | WinRoute |
| 1 | RaidenMAILD |
| 1 | mailmax |
| 1 | Symantec AVGate |
| 1 | Eudora |
| 1 | XWall/Exchange |
| 14069 | TOTAL |