automated SMTP server survey 19991001
10454 servers queried in the last 90 days
5157 49.33 Sendmail
770 7.36 MS Exchange
485 4.63 qmail
472 4.51 unknown
270 2.58 IMail
242 2.31 Lotus
213 2.03 Exim
212 2.02 Netscape Mail server
191 1.82 Post.Office
170 1.62 Raptor Firewall
157 1.50 CheckPoint FireWall-1
149 1.42 NT Mail
146 1.39 ZMailer
119 1.13 Mercur
119 1.13 Smail
109 1.04 GroupWise
95 0.90 unknown (SMTP Rec.)
81 0.77 InterScan VirusWall
74 0.70 SMTP/cmap
71 0.67 Mercury
70 0.66 AltaVista Firewall
58 0.55 MS SMTP Mail
57 0.54 Eudora/AIMS/Mailshare
54 0.51 MailSite SMTP Receiver
48 0.45 EMWACS IMS
48 0.45 Intermail
48 0.45 Postfix
47 0.44 MDaemon
47 0.44 PMDF
38 0.36 PP
36 0.34 Obtuse wrapper
35 0.33 NPlex
33 0.31 Mail-Max
29 0.27 Stalker
27 0.25 David PostMan
27 0.25 Sun
25 0.23 SLMail
24 0.22 Integralis SMTP Receiver
24 0.22 unknown (mailcity?)
20 0.19 InterLock
19 0.18 Rocketmail
19 0.18 SMTP-GW
18 0.17 MailShield
18 0.17 Worldmail
17 0.16 WebShield
16 0.15 DSMTP
15 0.14 Mail.Hub TurboSendmail
14 0.13 MMDF
13 0.12 FirstClass
13 0.12 Lyris
12 0.11 AltaVista Mail
11 0.10 MX
10 0.09 IBM AS/400 SMTP
10 0.09 IMA SMTP
10 0.09 TFS
8 0.07 GMX (qmail?)
8 0.07 LSMTP
7 0.06 Apple Internet Mail Server
7 0.06 AppleShare
7 0.06 ccMail
7 0.06 Cyberguard or so
7 0.06 Hawkeye SMTP
7 0.06 Rapidsite
6 0.05 FTGate
6 0.05 IBM VM SMTP
6 0.05 Quickmail
5 0.04 IPAD
5 0.04 MMTA
5 0.04 UCX
5 0.04 WorldSecure
4 0.03 Connect2-SMTP
3 0.02 Interchange
3 0.02 Mail.Link
3 0.02 SMTP/smtp-proxy
3 0.02 Soft-Switch LMS
3 0.02 Tid InfoMail
3 0.02 USA.NET
3 0.02 Worldgroup
2 0.01 iSMTP
2 0.01 Kryptowall
2 0.01 PowerWeb
2 0.01 usmtpd
1 0.00 Fwmail
1 0.00 Hummingbird SMTPD
1 0.00 LetterRip
1 0.00 MailBeamer
1 0.00 Mailmonster
1 0.00 mirabilis pager?
1 0.00 NASTA Gate SMTP Server
1 0.00 Postfix/VMailer
1 0.00 SiteClick
1 0.00 SMTP-OpenVMS
1 0.00 TGV/CISCO-MultiNet
1 0.00 Viking
1 0.00 WatchGuard