automated SMTP server survey 19990601
8049 servers queried in the last 90 days
4093 50.85 Sendmail
570 7.08 MS Exchange
338 4.19 qmail
243 3.01 unknown
207 2.57 Lotus
199 2.47 Netscape Mail server
164 2.03 IMail
163 2.02 Exim
149 1.85 Post.Office
128 1.59 NT Mail
119 1.47 Raptor Firewall
117 1.45 CheckPoint FireWall-1
114 1.41 ZMailer
108 1.34 Smail
94 1.16 Mercur
80 0.99 GroupWise
71 0.88 Mercury
65 0.80 unknown (SMTP Rec.)
59 0.73 InterScan VirusWall
57 0.70 AltaVista Firewall
51 0.63 Eudora/AIMS/Mailshare
50 0.62 MS SMTP Mail
49 0.60 EMWACS IMS
42 0.52 PP
42 0.52 SMTP/cmap
40 0.49 MailSite SMTP Receiver
40 0.49 PMDF
35 0.43 Intermail
29 0.36 MDaemon
29 0.36 Obtuse wrapper
28 0.34 NPlex
24 0.29 SLMail
23 0.28 Rocketmail
22 0.27 unknown (mailcity?)
21 0.26 David PostMan
21 0.26 Integralis SMTP Receiver
21 0.26 InterLock
20 0.24 Postfix
20 0.24 Stalker
15 0.18 Mail.Hub TurboSendmail
14 0.17 GMX (qmail?)
14 0.17 Mail-Max
14 0.17 MX
13 0.16 IMA SMTP
13 0.16 MMDF
12 0.14 FirstClass
11 0.13 Apple Internet Mail Server
11 0.13 DSMTP
11 0.13 SMTP-GW
11 0.13 Sun
9 0.11 MailShield
9 0.11 MMTA
9 0.11 Worldmail
8 0.09 AltaVista Mail
8 0.09 FTGate
8 0.09 IBM AS/400 SMTP
7 0.08 Cyberguard or so
7 0.08 Hawkeye SMTP
6 0.07 IBM VM SMTP
6 0.07 TFS
6 0.07 WebShield
6 0.07 Worldgroup
5 0.06 ccMail
5 0.06 Lyris
5 0.06 Quickmail
4 0.04 AppleShare
4 0.04 Connect2-SMTP
4 0.04 Kryptowall
4 0.04 LSMTP
4 0.04 Rapidsite
4 0.04 Soft-Switch LMS
3 0.03 SMTP/smtp-proxy
3 0.03 Tid InfoMail
3 0.03 UCX
2 0.02 IPAD
2 0.02 Mail.Link
2 0.02 MailBeamer
2 0.02 PowerWeb
2 0.02 SiteClick
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 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 Viking