| Count | MTA |
|---|---|
| 130200 | IdeaSmtp |
| 76844 | blocked |
| 20799 | Exim |
| 20589 | postfix |
| 8800 | qmail |
| 3236 | unknown |
| 2534 | sendmail |
| 2139 | MS Exchange |
| 331 | Cisco |
| 238 | barracuda |
| 208 | Lotus Domino |
| 161 | rblsmtpd |
| 150 | MailEnable |
| 79 | XMail |
| 62 | mdaemon |
| 41 | qpsmtpd |
| 37 | eSafe |
| 31 | Novell Groupwise |
| 31 | Kerio |
| 28 | IceWarp |
| 20 | Mercury |
| 19 | PowerMTA |
| 14 | XWall/Exchange |
| 12 | Argosoft NT |
| 8 | james |
| 8 | Sun JSMS |
| 7 | TrendMicro Reputation |
| 7 | Sophos |
| 7 | communigate |
| 6 | SonicWALL |
| 6 | SurgeSMTP |
| 5 | merak |
| 4 | DeskNow |
| 3 | MikroTik |
| 3 | UNIX Zmailer |
| 3 | Python SMTP |
| 2 | Lotus Notes |
| 2 | VHCS |
| 2 | Spamfilter ISP |
| 2 | hmailserver |
| 2 | Novonyx |
| 2 | $1 |
| 1 | nplex |
| 1 | Code-Crafters |
| 1 | zmailer |
| 1 | Scalix |
| 1 | Symantec AVGate |
| 1 | CheckPoint FW |
| 1 | spamd |
| 1 | imail |
| 1 | mercur |
| 266691 | TOTAL |