automated SMTP server survey 19990916
10111 servers queried in the last 90 days
5008 49.53 Sendmail
737 7.28 MS Exchange
456 4.50 qmail
437 4.32 unknown
261 2.58 IMail
238 2.35 Lotus
214 2.11 Netscape Mail server
208 2.05 Exim
192 1.89 Post.Office
165 1.63 Raptor Firewall
155 1.53 CheckPoint FireWall-1
147 1.45 ZMailer
142 1.40 NT Mail
115 1.13 Mercur
112 1.10 Smail
106 1.04 GroupWise
95 0.93 unknown (SMTP Rec.)
77 0.76 InterScan VirusWall
70 0.69 Mercury
69 0.68 AltaVista Firewall
67 0.66 SMTP/cmap
56 0.55 Eudora/AIMS/Mailshare
55 0.54 MailSite SMTP Receiver
54 0.53 MS SMTP Mail
48 0.47 EMWACS IMS
48 0.47 MDaemon
45 0.44 PMDF
43 0.42 Postfix
41 0.40 Intermail
38 0.37 PP
36 0.35 Obtuse wrapper
32 0.31 NPlex
30 0.29 Mail-Max
28 0.27 Stalker
27 0.26 David PostMan
24 0.23 SLMail
24 0.23 unknown (mailcity?)
23 0.22 Integralis SMTP Receiver
22 0.21 Sun
21 0.20 InterLock
21 0.20 Rocketmail
18 0.17 SMTP-GW
16 0.15 Mail.Hub TurboSendmail
16 0.15 WebShield
15 0.14 MailShield
14 0.13 MMDF
14 0.13 Worldmail
13 0.12 AltaVista Mail
13 0.12 FirstClass
13 0.12 Lyris
12 0.11 DSMTP
10 0.09 IBM AS/400 SMTP
10 0.09 IMA SMTP
10 0.09 MX
9 0.08 TFS
8 0.07 GMX (qmail?)
7 0.06 Apple Internet Mail Server
7 0.06 AppleShare
7 0.06 ccMail
7 0.06 Hawkeye SMTP
7 0.06 LSMTP
7 0.06 MMTA
7 0.06 Quickmail
6 0.05 Cyberguard or so
6 0.05 FTGate
6 0.05 IBM VM SMTP
6 0.05 Rapidsite
6 0.05 WorldSecure
5 0.04 Connect2-SMTP
4 0.03 IPAD
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 UCX
3 0.02 USA.NET
3 0.02 Worldgroup
2 0.01 iSMTP
2 0.01 Kryptowall
2 0.01 LetterRip
2 0.01 PowerWeb
2 0.01 SiteClick
2 0.01 usmtpd
1 0.00 Fwmail
1 0.00 Hummingbird SMTPD
1 0.00 Mailmonster
1 0.00 mirabilis pager?
1 0.00 NASTA Gate SMTP Server
1 0.00 Postfix/VMailer
1 0.00 SMTP-OpenVMS
1 0.00 TGV/CISCO-MultiNet
1 0.00 Viking