automated SMTP server survey 19991101
10992 servers queried in the last 90 days
5435 49.44 Sendmail
794 7.22 MS Exchange
559 5.08 qmail
537 4.88 unknown
292 2.65 IMail
242 2.20 Exim
226 2.05 Lotus
207 1.88 Netscape Mail server
194 1.76 Post.Office
169 1.53 Raptor Firewall
162 1.47 CheckPoint FireWall-1
155 1.41 NT Mail
152 1.38 ZMailer
131 1.19 Mercur
109 0.99 GroupWise
109 0.99 Smail
92 0.83 unknown (SMTP Rec.)
78 0.70 InterScan VirusWall
78 0.70 SMTP/cmap
74 0.67 Mercury
73 0.66 AltaVista Firewall
62 0.56 Eudora/AIMS/Mailshare
61 0.55 MS SMTP Mail
61 0.55 Postfix
54 0.49 Intermail
54 0.49 MailSite SMTP Receiver
51 0.46 PMDF
49 0.44 MDaemon
47 0.42 EMWACS IMS
41 0.37 NPlex
40 0.36 Obtuse wrapper
34 0.30 PP
32 0.29 Mail-Max
31 0.28 Stalker
29 0.26 Sun
26 0.23 David PostMan
26 0.23 unknown (mailcity?)
22 0.20 Integralis SMTP Receiver
22 0.20 WebShield
21 0.19 DSMTP
21 0.19 InterLock
21 0.19 SLMail
20 0.18 MailShield
18 0.16 SMTP-GW
17 0.15 Worldmail
15 0.13 FirstClass
14 0.12 Mail.Hub TurboSendmail
13 0.11 AltaVista Mail
13 0.11 MMDF
12 0.10 IBM AS/400 SMTP
12 0.10 IMA SMTP
11 0.10 AppleShare
11 0.10 MX
11 0.10 TFS
10 0.09 Lyris
8 0.07 FTGate
8 0.07 GMX (qmail?)
7 0.06 Apple Internet Mail Server
7 0.06 ccMail
7 0.06 Connect2-SMTP
7 0.06 Hawkeye SMTP
7 0.06 IBM VM SMTP
7 0.06 LSMTP
7 0.06 Rapidsite
7 0.06 Rocketmail
6 0.05 Quickmail
5 0.04 Cyberguard or so
5 0.04 UCX
4 0.03 Interchange
4 0.03 Worldgroup
3 0.02 IPAD
3 0.02 Mail.Link
3 0.02 MailBeamer
3 0.02 MMTA
3 0.02 Soft-Switch LMS
3 0.02 Tid InfoMail
3 0.02 USA.NET
3 0.02 usmtpd
2 0.01 Fwmail
2 0.01 iSMTP
2 0.01 Kryptowall
2 0.01 PowerWeb
2 0.01 SiteClick
2 0.01 SMTP/smtp-proxy
2 0.01 WorldSecure
1 0.00 Hummingbird SMTPD
1 0.00 mirabilis pager?
1 0.00 NASTA Gate SMTP Server
1 0.00 Postfix/VMailer
1 0.00 SMTP-OpenVMS
1 0.00 TGV/CISCO-MultiNet
1 0.00 Viking
1 0.00 WatchGuard