This year's scan was done via shodan. In total 2.3 billion IP addresses were scanned in this survey.
| Number of IPs scanned: | 2319282339 (54%) | |||||
| Number of IMAP servers found: | 2768737 | |||||
| Number of servers detected using banner text: | 2542769 (91%) | |||||
| Number of servers detected using command replies: | 2762233 (99%) | |||||
| Number of conflicting banner vs. reply detections: | 269 |
| Software | Count | 2016 % | points diff | 2014 % | 2013 % | 2012 % |
|---|---|---|---|---|---|---|
| Dovecot | 1896330 | 68.49 | +11.33 | 57.16 | 52.87 | 48.37 |
| Courier | 470671 | 17.00 | -6.42 | 23.42 | 27.14 | 30.70 |
| IdeaImapServer | 87456 | 3.16 | +0.49 | 2.67 | 2.87 | 2.35 |
| NetArt | 53606 | 1.94 | +0.25 | 1.69 | 1.56 | 1.25 |
| Exchange | 42798 | 1.55 | -1.30 | 2.85 | 2.96 | 3.27 |
| MailEnable | 27727 | 1.00 | -0.61 | 1.61 | 1.43 | 1.28 |
| Zimbra | 25827 | 0.93 | +0.03 | 0.90 | 0.81 | 0.59 |
| UW-IMAP | 25626 | 0.93 | -1.12 | 2.05 | 2.32 | 3.21 |
| Cyrus | 18622 | 0.67 | -0.27 | 0.94 | 1.02 | 1.18 |
| hMailServer | 16285 | 0.59 | -0.26 | 0.85 | 0.79 | 0.77 |
| Kerio | 15037 | 0.54 | -0.10 | 0.64 | 0.61 | 0.61 |
| Hurricane Electric | 12019 | 0.43 | -0.18 | 0.61 | 0.56 | 0.00 |
| SmarterMail | 11120 | 0.40 | -0.30 | 0.70 | 0.69 | 0.78 |
| MDaemon | 9718 | 0.35 | -0.42 | 0.77 | 0.75 | 0.79 |
| Bigfoot | 9159 | 0.33 | +0.09 | 0.24 | 0.24 | 0.36 |
| IceWarp | 6988 | 0.25 | -0.12 | 0.37 | 0.39 | 0.44 |
| CommuniGate Pro | 5149 | 0.19 | -0.08 | 0.27 | 0.27 | 0.31 |
| IMail | 4732 | 0.17 | -0.20 | 0.37 | 0.44 | 0.57 |
| (Unknown) | 3580 | 0.13 | -0.23 | 0.36 | 0.51 | 1.06 |
| Surgemail | 2256 | 0.08 | +-0 | 0.08 | 0.09 | 0.12 |
| Zarafa | 2230 | 0.08 | -0.03 | 0.11 | 0.10 | 0.09 |
| Domino | 2137 | 0.08 | -0.08 | 0.16 | 0.17 | 0.44 |
| nginx | 1961 | 0.07 | +0.01 | 0.06 | 0.05 | 0.00 |
| Winmail | 1378 | 0.05 | -0.01 | 0.06 | 0.05 | 0.05 |
| Perdition | 1277 | 0.05 | +0.02 | 0.03 | 0.19 | 0.17 |
| Coremail | 1226 | 0.04 | +0.01 | 0.03 | 0.02 | 0.01 |
| imapfront | 1103 | 0.04 | -0.05 | 0.09 | 0.12 | 0.20 |
| Axigen | 1097 | 0.04 | -0.01 | 0.05 | 0.05 | 0.04 |
| GImap | 893 | 0.03 | +-0 | 0.03 | 0.03 | 0.03 |
| GroupWise | 867 | 0.03 | -0.03 | 0.06 | 0.07 | 0.09 |
| Citadel | 726 | 0.03 | -0.01 | 0.04 | 0.05 | 0.04 |
| (Not IMAP protocol) | 718 | 0.03 | -0.08 | 0.11 | 0.13 | 0.03 |
| dbmail | 697 | 0.03 | -0.01 | 0.04 | 0.04 | 0.05 |
| MailSite | 580 | 0.02 | -0.02 | 0.04 | 0.04 | 0.04 |
| Binc | 567 | 0.02 | -0.01 | 0.03 | 0.03 | 0.05 |
| David.fx | 529 | 0.02 | -0.01 | 0.03 | 0.03 | 0.03 |
| InSciTek | 394 | 0.01 | -0.04 | 0.05 | 0.06 | 0.05 |
| Gordano | 352 | 0.01 | -0.01 | 0.02 | 0.02 | 0.04 |
| Mercury | 338 | 0.01 | -0.02 | 0.03 | 0.03 | 0.03 |
| modusMail | 319 | 0.01 | -0.02 | 0.03 | 0.02 | 0.04 |
| C35IMAP | 314 | 0.01 | +0.01 | 0.00 | 0.00 | 0.00 |
| T3 | 305 | 0.01 | +-0 | 0.01 | 0.01 | 0.00 |
| Synametrics | 259 | 0.01 | +-0 | 0.01 | 0.01 | 0.00 |
| FirstClass | 254 | 0.01 | -0.01 | 0.02 | 0.02 | 0.02 |
| Oracle CMES | 227 | 0.01 | -0.01 | 0.02 | 0.02 | 0.03 |
| MailStore | 221 | 0.01 | +-0 | 0.01 | 0.00 | 0.00 |
| ArGoSoft | 180 | 0.01 | -0.01 | 0.02 | 0.01 | 0.02 |
| Ability | 179 | 0.01 | +-0 | 0.01 | 0.01 | 0.02 |
| CallPilot | 158 | 0.01 | -0.01 | 0.02 | 0.02 | 0.02 |
| EIMS | 158 | 0.01 | +-0 | 0.01 | 0.01 | 0.02 |
| WinWebMail | 153 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 |
| DeskNow | 150 | 0.01 | +-0 | 0.01 | 0.01 | 0.02 |
| Scalix | 149 | 0.01 | +-0 | 0.01 | 0.01 | 0.02 |
| ipapp.com | 144 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 |
| UnknownProxy | 135 | 0.00 | -0.01 | 0.01 | 0.01 | 0.00 |
| DFN | 115 | 0.00 | -0.07 | 0.07 | 0.07 | 0.00 |
| EmailArchitect | 109 | 0.00 | -0.01 | 0.01 | 0.01 | 0.01 |
| VPOP3 | 95 | 0.00 | -0.01 | 0.01 | 0.01 | 0.01 |
| James | 95 | 0.00 | -0.01 | 0.01 | 0.00 | 0.00 |
| TurboMail | 91 | 0.00 | -0.01 | 0.01 | 0.01 | 0.01 |
| Office-Logic InterChange | 86 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| SmartMax | 84 | 0.00 | -0.01 | 0.01 | 0.01 | 0.01 |
| Mirapoint | 75 | 0.00 | +-0 | 0.00 | 0.01 | 0.01 |
| imapproxy | 75 | 0.00 | -0.01 | 0.01 | 0.01 | 0.00 |
| OpenWave | 66 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| EVO | 63 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| UMSS | 61 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| iSCREAM | 61 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Mailtraq | 52 | 0.00 | -0.01 | 0.01 | 0.01 | 0.01 |
| DEEPMail | 49 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Critical Path | 42 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| MailNow! | 40 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| CrediMail | 38 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| CUE | 37 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| mail.ru | 36 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| JanaServer | 36 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Tmailer | 34 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| QuarkMail | 25 | 0.00 | +-0 | 0.00 | 0.00 | 0.15 |
| MuseMail | 23 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| AMTANGEE | 16 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Archiveopteryx | 15 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| ExpressMail | 15 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| TimeMaker | 14 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Hmail | 14 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| hgigamail | 13 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Mercur | 12 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Softalk | 12 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| KEN! | 11 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| TIMS | 8 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| NPlex | 7 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| EarthLink | 6 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| SPA-PRO | 5 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Isode | 5 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Oracle Beehive | 5 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| AppleMailServer | 3 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| PMDF | 3 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| Banckle | 2 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| AIMC | 1 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |
| TeamWARE | 1 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 |