automated SMTP server survey 19990516
8011 servers queried in the last 90 days
4095 51.11 Sendmail
577 7.20 MS Exchange
327 4.08 qmail
215 2.68 unknown
209 2.60 Netscape Mail server
204 2.54 Lotus
159 1.98 Post.Office
156 1.94 IMail
154 1.92 Exim
131 1.63 NT Mail
120 1.49 ZMailer
111 1.38 Smail
110 1.37 Raptor Firewall
109 1.36 CheckPoint FireWall-1
99 1.23 Mercur
77 0.96 Mercury
76 0.94 GroupWise
63 0.78 unknown (SMTP Rec.)
60 0.74 InterScan VirusWall
56 0.69 AltaVista Firewall
50 0.62 EMWACS IMS
50 0.62 MS SMTP Mail
49 0.61 Eudora/AIMS/Mailshare
46 0.57 PP
42 0.52 PMDF
41 0.51 MailSite SMTP Receiver
40 0.49 SMTP/cmap
38 0.47 Intermail
29 0.36 MDaemon
26 0.32 Obtuse wrapper
24 0.29 NPlex
24 0.29 unknown (mailcity?)
23 0.28 Rocketmail
23 0.28 SLMail
21 0.26 Postfix
20 0.24 Integralis SMTP Receiver
20 0.24 InterLock
20 0.24 Stalker
19 0.23 David PostMan
16 0.19 Mail.Hub TurboSendmail
15 0.18 Mail-Max
15 0.18 MMDF
14 0.17 GMX (qmail?)
13 0.16 FirstClass
13 0.16 IMA SMTP
12 0.14 MMTA
11 0.13 Apple Internet Mail Server
11 0.13 MX
11 0.13 SMTP-GW
9 0.11 MailShield
8 0.09 AltaVista Mail
8 0.09 DSMTP
8 0.09 IBM AS/400 SMTP
8 0.09 Worldmail
7 0.08 FTGate
7 0.08 Sun
6 0.07 Hawkeye SMTP
6 0.07 IBM VM SMTP
6 0.07 TFS
5 0.06 ccMail
5 0.06 Cyberguard or so
5 0.06 Kryptowall
5 0.06 LSMTP
5 0.06 Lyris
5 0.06 Quickmail
5 0.06 WebShield
5 0.06 Worldgroup
4 0.04 AppleShare
4 0.04 Connect2-SMTP
4 0.04 Rapidsite
4 0.04 Soft-Switch LMS
4 0.04 UCX
3 0.03 PowerWeb
3 0.03 Tid InfoMail
2 0.02 iSMTP
2 0.02 Mail.Link
2 0.02 SiteClick
2 0.02 SMTP/smtp-proxy
2 0.02 TGV/CISCO-MultiNet
2 0.02 USA.NET
2 0.02 usmtpd
2 0.02 WorldSecure
1 0.01 Charon
1 0.01 Hummingbird SMTPD
1 0.01 IBM MVS SMTP
1 0.01 IPAD
1 0.01 MailBeamer
1 0.01 Mailmonster
1 0.01 mirabilis pager?
1 0.01 NASTA Gate SMTP Server
1 0.01 SMTP-OpenVMS
1 0.01 Sonicmail
1 0.01 Viking
1 0.01 VOPMail