automated SMTP server survey 20000116
10451 servers queried in the last 90 days
5008 47.91 Sendmail
761 7.28 MS Exchange
635 6.07 unknown
523 5.00 qmail
256 2.44 IMail
246 2.35 Exim
221 2.11 Lotus
195 1.86 Netscape Mail server
188 1.79 CheckPoint FireWall-1
182 1.74 Post.Office
173 1.65 Raptor Firewall
155 1.48 NT Mail
149 1.42 ZMailer
123 1.17 Mercur
107 1.02 Smail
99 0.94 unknown (SMTP Rec.)
92 0.88 GroupWise
91 0.87 InterScan VirusWall
77 0.73 SMTP/cmap
71 0.67 MS SMTP Mail
68 0.65 Eudora/AIMS/Mailshare
66 0.63 AltaVista Firewall
66 0.63 Postfix
64 0.61 Mercury
61 0.58 Intermail
47 0.44 MailSite SMTP Receiver
47 0.44 NPlex
44 0.42 PMDF
38 0.36 EMWACS IMS
38 0.36 MDaemon
38 0.36 Obtuse wrapper
31 0.29 Sun
29 0.27 David PostMan
27 0.25 PP
26 0.24 Stalker
23 0.22 SLMail
23 0.22 WebShield
22 0.21 Mail-Max
22 0.21 unknown (mailcity?)
19 0.18 MailShield
19 0.18 SMTP-GW
15 0.14 DSMTP
15 0.14 InterLock
14 0.13 FirstClass
14 0.13 MMDF
13 0.12 Integralis SMTP Receiver
13 0.12 Mail.Hub TurboSendmail
12 0.11 Worldmail
11 0.10 IBM AS/400 SMTP
11 0.10 TFS
10 0.09 AltaVista Mail
10 0.09 ccMail
10 0.09 GMX (qmail?)
8 0.07 AppleShare
8 0.07 MX
8 0.07 Rapidsite
7 0.06 FTGate
7 0.06 IMA SMTP
7 0.06 Lyris
7 0.06 Quickmail
6 0.05 Connect2-SMTP
5 0.04 Apple Internet Mail Server
5 0.04 Cyberguard or so
5 0.04 IBM VM SMTP
5 0.04 Interchange
4 0.03 MMTA
4 0.03 USA.NET
4 0.03 usmtpd
3 0.02 iSMTP
3 0.02 SMTP/smtp-proxy
3 0.02 Tid InfoMail
3 0.02 UCX
2 0.01 Hawkeye SMTP
2 0.01 Kryptowall
2 0.01 ListSTAR
2 0.01 LSMTP
2 0.01 Mail.Link
2 0.01 MailBeamer
2 0.01 Postfix/VMailer
2 0.01 SiteClick
2 0.01 Soft-Switch LMS
2 0.01 Viking
2 0.01 Worldgroup
1 0.00 Fwmail
1 0.00 Hummingbird SMTPD
1 0.00 IPAD
1 0.00 mirabilis pager?
1 0.00 NASTA Gate SMTP Server
1 0.00 PowerWeb
1 0.00 TGV/CISCO-MultiNet
1 0.00 UnityMail
1 0.00 WorldSecure