automated SMTP server survey 19990816
9421 servers queried in the last 90 days
4642 49.27 Sendmail
708 7.51 MS Exchange
404 4.28 unknown
402 4.26 qmail
229 2.43 Lotus
225 2.38 IMail
205 2.17 Netscape Mail server
187 1.98 Post.Office
185 1.96 Exim
151 1.60 CheckPoint FireWall-1
145 1.53 Raptor Firewall
137 1.45 ZMailer
133 1.41 NT Mail
117 1.24 Mercur
109 1.15 Smail
100 1.06 GroupWise
88 0.93 unknown (SMTP Rec.)
76 0.80 Mercury
75 0.79 InterScan VirusWall
64 0.67 AltaVista Firewall
58 0.61 MailSite SMTP Receiver
58 0.61 SMTP/cmap
57 0.60 Eudora/AIMS/Mailshare
47 0.49 EMWACS IMS
46 0.48 MS SMTP Mail
42 0.44 MDaemon
40 0.42 PMDF
38 0.40 Obtuse wrapper
36 0.38 PP
34 0.36 Intermail
29 0.30 NPlex
29 0.30 Postfix
28 0.29 David PostMan
26 0.27 Mail-Max
25 0.26 Rocketmail
25 0.26 Stalker
24 0.25 unknown (mailcity?)
22 0.23 Integralis SMTP Receiver
22 0.23 SLMail
21 0.22 InterLock
20 0.21 Sun
19 0.20 SMTP-GW
15 0.15 Mail.Hub TurboSendmail
15 0.15 MailShield
14 0.14 MMDF
14 0.14 WebShield
13 0.13 Worldmail
12 0.12 AltaVista Mail
11 0.11 FirstClass
11 0.11 IMA SMTP
11 0.11 MX
10 0.10 Lyris
9 0.09 IBM AS/400 SMTP
8 0.08 ccMail
8 0.08 Cyberguard or so
8 0.08 DSMTP
8 0.08 GMX (qmail?)
8 0.08 MMTA
7 0.07 Apple Internet Mail Server
7 0.07 FTGate
7 0.07 IBM VM SMTP
7 0.07 LSMTP
7 0.07 Quickmail
7 0.07 TFS
6 0.06 Connect2-SMTP
5 0.05 Hawkeye SMTP
5 0.05 UCX
5 0.05 WorldSecure
4 0.04 AppleShare
4 0.04 Rapidsite
4 0.04 Soft-Switch LMS
3 0.03 IPAD
3 0.03 Kryptowall
3 0.03 Mail.Link
3 0.03 SMTP/smtp-proxy
3 0.03 Tid InfoMail
3 0.03 USA.NET
3 0.03 Worldgroup
2 0.02 LetterRip
2 0.02 MailBeamer
2 0.02 PowerWeb
2 0.02 SiteClick
2 0.02 usmtpd
1 0.01 Charon
1 0.01 Fwmail
1 0.01 Hummingbird SMTPD
1 0.01 Interchange
1 0.01 iSMTP
1 0.01 Mailmonster
1 0.01 mirabilis pager?
1 0.01 NASTA Gate SMTP Server
1 0.01 Postfix/VMailer
1 0.01 SMTP-OpenVMS
1 0.01 TGV/CISCO-MultiNet
1 0.01 Viking