| Count | MTA |
|---|---|
| 3064 | postfix |
| 2823 | MS Exchange |
| 1090 | Exim |
| 704 | blocked |
| 477 | qmail |
| 453 | unknown |
| 207 | sendmail |
| 183 | mdaemon |
| 146 | Cisco |
| 140 | MailEnable |
| 58 | Kerio |
| 53 | rblsmtpd |
| 52 | mailmarshal |
| 49 | eSafe |
| 42 | barracuda |
| 28 | SonicWALL |
| 18 | qpsmtpd |
| 14 | Sophos |
| 10 | PowerMTA |
| 9 | Novell Groupwise |
| 8 | Lotus Domino |
| 7 | IceWarp |
| 7 | EMailArchitect |
| 5 | communigate |
| 5 | XMail |
| 4 | stalker |
| 4 | merak |
| 3 | james |
| 3 | Argosoft NT |
| 3 | Mercury |
| 3 | InterScan |
| 3 | smoothwall |
| 2 | VMS_PMDF |
| 2 | firstclass |
| 2 | hmailserver |
| 2 | MIMESWeeper |
| 2 | mirapoint |
| 2 | DeskNow |
| 2 | Code-Crafters |
| 2 | vpop3 |
| 1 | Hurricane |
| 1 | Eudora |
| 1 | CheckPoint FW |
| 1 | Sun JSMS |
| 1 | Winmail |
| 1 | SurgeSMTP |
| 1 | XWall/Exchange |
| 1 | TrendMicro Reputation |
| 9699 | TOTAL |