automated SMTP server survey 19990716
8597 servers queried in the last 90 days
4289 49.88 Sendmail
606 7.04 MS Exchange
359 4.17 qmail
337 3.91 unknown
217 2.52 Lotus
192 2.23 IMail
191 2.22 Netscape Mail server
172 2.00 Exim
167 1.94 Post.Office
139 1.61 CheckPoint FireWall-1
131 1.52 Raptor Firewall
130 1.51 NT Mail
122 1.41 ZMailer
116 1.34 Mercur
106 1.23 Smail
87 1.01 GroupWise
76 0.88 Mercury
73 0.84 unknown (SMTP Rec.)
68 0.79 InterScan VirusWall
61 0.70 AltaVista Firewall
51 0.59 SMTP/cmap
50 0.58 EMWACS IMS
49 0.56 MailSite SMTP Receiver
46 0.53 Eudora/AIMS/Mailshare
43 0.50 MS SMTP Mail
38 0.44 PMDF
36 0.41 PP
35 0.40 MDaemon
34 0.39 Obtuse wrapper
30 0.34 Intermail
29 0.33 NPlex
28 0.32 David PostMan
26 0.30 Postfix
25 0.29 Rocketmail
23 0.26 InterLock
23 0.26 unknown (mailcity?)
22 0.25 SLMail
21 0.24 Stalker
19 0.22 Integralis SMTP Receiver
17 0.19 Mail-Max
15 0.17 Mail.Hub TurboSendmail
15 0.17 MailShield
15 0.17 Sun
14 0.16 MMDF
13 0.15 SMTP-GW
12 0.13 FirstClass
12 0.13 MX
12 0.13 WebShield
11 0.12 IMA SMTP
11 0.12 Worldmail
10 0.11 AltaVista Mail
10 0.11 GMX (qmail?)
10 0.11 IBM AS/400 SMTP
9 0.10 DSMTP
9 0.10 Lyris
9 0.10 MMTA
8 0.09 Apple Internet Mail Server
8 0.09 Cyberguard or so
8 0.09 Quickmail
7 0.08 FTGate
7 0.08 IBM VM SMTP
6 0.06 ccMail
6 0.06 Connect2-SMTP
6 0.06 Hawkeye SMTP
6 0.06 Worldgroup
5 0.05 TFS
5 0.05 UCX
4 0.04 AppleShare
4 0.04 LSMTP
4 0.04 Rapidsite
4 0.04 Soft-Switch LMS
4 0.04 WorldSecure
3 0.03 Kryptowall
3 0.03 MailBeamer
3 0.03 Tid InfoMail
2 0.02 IPAD
2 0.02 Mail.Link
2 0.02 PowerWeb
2 0.02 SiteClick
2 0.02 SMTP/smtp-proxy
2 0.02 USA.NET
2 0.02 usmtpd
1 0.01 Charon
1 0.01 Hummingbird SMTPD
1 0.01 Interchange
1 0.01 iSMTP
1 0.01 LetterRip
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