automated SMTP server survey 19991201
11327 servers queried in the last 90 days
5505 48.60 Sendmail
823 7.26 MS Exchange
593 5.23 qmail
586 5.17 unknown
307 2.71 IMail
260 2.29 Exim
234 2.06 Lotus
213 1.88 Netscape Mail server
194 1.71 Post.Office
178 1.57 CheckPoint FireWall-1
176 1.55 Raptor Firewall
162 1.43 ZMailer
159 1.40 NT Mail
137 1.20 Mercur
125 1.10 Smail
111 0.97 GroupWise
95 0.83 unknown (SMTP Rec.)
83 0.73 InterScan VirusWall
77 0.67 SMTP/cmap
75 0.66 Mercury
73 0.64 AltaVista Firewall
71 0.62 Eudora/AIMS/Mailshare
66 0.58 MS SMTP Mail
66 0.58 Postfix
61 0.53 Intermail
59 0.52 MailSite SMTP Receiver
55 0.48 PMDF
49 0.43 MDaemon
49 0.43 NPlex
47 0.41 EMWACS IMS
40 0.35 Obtuse wrapper
36 0.31 Sun
34 0.30 PP
29 0.25 David PostMan
29 0.25 Stalker
26 0.22 Mail-Max
25 0.22 unknown (mailcity?)
24 0.21 WebShield
23 0.20 DSMTP
23 0.20 SLMail
22 0.19 Integralis SMTP Receiver
21 0.18 MailShield
20 0.17 InterLock
18 0.15 SMTP-GW
17 0.15 FirstClass
17 0.15 Worldmail
14 0.12 IBM AS/400 SMTP
13 0.11 AltaVista Mail
13 0.11 Mail.Hub TurboSendmail
13 0.11 MMDF
11 0.09 IMA SMTP
10 0.08 AppleShare
10 0.08 MX
10 0.08 TFS
9 0.07 FTGate
9 0.07 GMX (qmail?)
8 0.07 ccMail
8 0.07 Connect2-SMTP
8 0.07 Lyris
8 0.07 Rapidsite
6 0.05 Apple Internet Mail Server
6 0.05 IBM VM SMTP
6 0.05 Quickmail
5 0.04 Cyberguard or so
5 0.04 Interchange
4 0.03 LSMTP
4 0.03 MMTA
4 0.03 Rocketmail
4 0.03 UCX
4 0.03 Worldgroup
3 0.02 Hawkeye SMTP
3 0.02 MailBeamer
3 0.02 SMTP/smtp-proxy
3 0.02 Tid InfoMail
3 0.02 USA.NET
3 0.02 usmtpd
2 0.01 Fwmail
2 0.01 IPAD
2 0.01 iSMTP
2 0.01 Kryptowall
2 0.01 Mail.Link
2 0.01 SiteClick
2 0.01 Soft-Switch LMS
2 0.01 Viking
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 PowerWeb
1 0.00 TGV/CISCO-MultiNet
1 0.00 WatchGuard
1 0.00 WorldSecure