This year's scan was done via shodan. Approximately 40-50% of the internet was scanned
| Number of IMAP servers found: | 3856785 | |||||||||
| Number of servers detected using banner text: | 3588116 (93%) | |||||||||
| Number of servers detected using command replies: | 3674586 (95%) | |||||||||
| Number of conflicting banner vs. reply detections: | 227 |
| Software | Count | 2020 % | points diff | 2019 % | 2018 % | 2017 % | 2016 % | 2014 % | 2013 % | 2012 % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dovecot | 2966955 | 76.93 | +0.71 | 76.22 | 75.09 | 71.25 | 68.50 | 57.16 | 52.87 | 48.37 |
| Courier | 306588 | 7.95 | -1.11 | 9.06 | 9.96 | 12.34 | 17.00 | 23.42 | 27.14 | 30.70 |
| IdeaImapServer | 146889 | 3.81 | +0.15 | 3.66 | 3.27 | 3.52 | 3.17 | 2.67 | 2.87 | 2.35 |
| MailEnable | 69287 | 1.80 | +0.17 | 1.63 | 1.63 | 1.96 | 0.97 | 1.61 | 1.43 | 1.28 |
| NetArt | 59358 | 1.54 | +0.14 | 1.40 | 1.16 | 1.71 | 1.95 | 1.69 | 1.56 | 1.25 |
| Exchange | 49530 | 1.28 | -0.15 | 1.43 | 1.53 | 1.77 | 1.57 | 2.85 | 2.96 | 3.27 |
| Zimbra | 37867 | 0.98 | -0.04 | 1.02 | 0.96 | 0.93 | 0.94 | 0.90 | 0.81 | 0.59 |
| hMailServer | 27828 | 0.72 | +0.01 | 0.71 | 0.74 | 0.77 | 0.59 | 0.85 | 0.79 | 0.77 |
| Cyrus | 22558 | 0.58 | -0.03 | 0.61 | 0.62 | 0.68 | 0.67 | 0.94 | 1.02 | 1.18 |
| Hurricane Electric | 22124 | 0.57 | +0.07 | 0.50 | 0.51 | 0.62 | 0.42 | 0.61 | 0.56 | 0.00 |
| Kerio | 21454 | 0.56 | -0.04 | 0.60 | 0.56 | 0.54 | 0.55 | 0.64 | 0.61 | 0.61 |
| SmarterMail | 20475 | 0.53 | +0.01 | 0.52 | 0.54 | 0.62 | 0.38 | 0.70 | 0.69 | 0.78 |
| MDaemon | 18967 | 0.49 | -0.01 | 0.50 | 0.50 | 0.61 | 0.35 | 0.77 | 0.75 | 0.79 |
| (Unknown) | 12197 | 0.32 | +0.05 | 0.27 | 0.32 | 0.24 | 0.15 | 0.36 | 0.51 | 1.06 |
| UW-IMAP | 9905 | 0.26 | -0.04 | 0.30 | 0.34 | 0.65 | 0.91 | 2.05 | 2.32 | 3.21 |
| IceWarp | 7829 | 0.20 | -0.02 | 0.22 | 0.21 | 0.27 | 0.25 | 0.37 | 0.39 | 0.44 |
| nginx | 7539 | 0.20 | +0.05 | 0.15 | 0.12 | 0.08 | 0.07 | 0.06 | 0.05 | 0.00 |
| Bigfoot | 6229 | 0.16 | +0.10 | 0.06 | 0.13 | 0.03 | 0.33 | 0.24 | 0.24 | 0.36 |
| Winmail | 5652 | 0.15 | +0.10 | 0.05 | 0.06 | 0.05 | 0.05 | 0.06 | 0.05 | 0.05 |
| IMail | 5613 | 0.15 | -0.01 | 0.16 | 0.18 | 0.24 | 0.17 | 0.37 | 0.44 | 0.57 |
| CommuniGate Pro | 5532 | 0.14 | -0.01 | 0.15 | 0.19 | 0.22 | 0.18 | 0.27 | 0.27 | 0.31 |
| Domino | 2845 | 0.07 | -0.01 | 0.08 | 0.09 | 0.11 | 0.08 | 0.16 | 0.17 | 0.44 |
| Coremail | 2458 | 0.06 | +-0 | 0.06 | 0.05 | 0.04 | 0.04 | 0.03 | 0.02 | 0.01 |
| (Not IMAP protocol) | 2086 | 0.05 | -0.06 | 0.11 | 0.67 | 0.04 | 0.03 | 0.11 | 0.13 | 0.03 |
| Surgemail | 1914 | 0.05 | +-0 | 0.05 | 0.05 | 0.08 | 0.08 | 0.08 | 0.09 | 0.12 |
| Perdition | 1581 | 0.04 | +-0 | 0.04 | 0.04 | 0.05 | 0.05 | 0.03 | 0.19 | 0.17 |
| GImap | 1576 | 0.04 | +0.01 | 0.03 | 0.03 | 0.01 | 0.03 | 0.03 | 0.03 | 0.03 |
| Axigen | 1488 | 0.04 | +-0 | 0.04 | 0.04 | 0.04 | 0.04 | 0.05 | 0.05 | 0.04 |
| Zarafa | 1107 | 0.03 | -0.01 | 0.04 | 0.05 | 0.07 | 0.08 | 0.11 | 0.10 | 0.09 |
| David.fx | 1075 | 0.03 | +-0 | 0.03 | 0.03 | 0.04 | 0.02 | 0.03 | 0.03 | 0.03 |
| GroupWise | 749 | 0.02 | +-0 | 0.02 | 0.02 | 0.03 | 0.03 | 0.06 | 0.07 | 0.09 |
| MailStore | 677 | 0.02 | +-0 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | 0.00 | 0.00 |
| T3 | 624 | 0.02 | +-0 | 0.02 | 0.02 | 0.04 | 0.01 | 0.01 | 0.01 | 0.00 |
| InSciTek | 613 | 0.02 | +-0 | 0.02 | 0.02 | 0.02 | 0.01 | 0.05 | 0.06 | 0.05 |
| Mercury | 584 | 0.02 | +-0 | 0.02 | 0.02 | 0.02 | 0.01 | 0.03 | 0.03 | 0.03 |
| dbmail | 544 | 0.01 | +-0 | 0.01 | 0.02 | 0.02 | 0.02 | 0.04 | 0.04 | 0.05 |
| imapfront | 515 | 0.01 | -0.01 | 0.02 | 0.02 | 0.02 | 0.04 | 0.09 | 0.12 | 0.20 |
| Synametrics | 485 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.00 |
| Gordano | 461 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.02 | 0.04 |
| Citadel | 421 | 0.01 | -0.01 | 0.02 | 0.02 | 0.02 | 0.03 | 0.04 | 0.05 | 0.04 |
| Binc | 392 | 0.01 | +-0 | 0.01 | 0.01 | 0.02 | 0.02 | 0.03 | 0.03 | 0.05 |
| MailSite | 379 | 0.01 | +-0 | 0.01 | 0.02 | 0.03 | 0.02 | 0.04 | 0.04 | 0.04 |
| EmailArchitect | 311 | 0.01 | +-0 | 0.01 | 0.01 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 |
| modusMail | 243 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 | 0.01 | 0.03 | 0.02 | 0.04 |
| Oracle CMES | 219 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.02 | 0.03 |
| Ability | 210 | 0.01 | +-0 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 |
| James | 200 | 0.01 | +-0 | 0.01 | 0.02 | 0.01 | 0.00 | 0.01 | 0.00 | 0.00 |
| VPOP3 | 180 | 0.00 | +-0 | 0.00 | 0.00 | 0.01 | 0.00 | 0.01 | 0.01 | 0.01 |
| WinWebMail | 178 | 0.00 | +-0 | 0.00 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| FirstClass | 175 | 0.00 | -0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.02 | 0.02 |
| EIMS | 171 | 0.00 | +-0 | 0.00 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 |
| TurboMail | 161 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 |
| ArGoSoft | 145 | 0.00 | +-0 | 0.00 | 0.01 | 0.01 | 0.01 | 0.02 | 0.01 | 0.02 |
| DeskNow | 116 | 0.00 | +-0 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 |
| MailNow! | 113 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| CallPilot | 107 | 0.00 | +-0 | 0.00 | 0.00 | 0.01 | 0.01 | 0.02 | 0.02 | 0.02 |
| EVO | 104 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| mail.ru | 103 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| DEEPMail | 91 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Office-Logic InterChange | 87 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| AMTANGEE | 86 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Scalix | 85 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 | 0.02 |
| OpenWave | 75 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| iSCREAM | 58 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Critical Path | 54 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| CrediMail | 52 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Mailtraq | 51 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 |
| JanaServer | 50 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| UMSS | 49 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| UnknownProxy | 48 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 | 0.00 |
| EarthLink | 46 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| imapproxy | 34 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.00 |
| Hmail | 34 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Tmailer | 23 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Mirapoint | 23 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 |
| Archiveopteryx | 21 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| CUE | 21 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Mercur | 20 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| ExpressMail | 18 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| QuarkMail | 11 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 |
| TimeMaker | 10 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| KEN! | 10 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| SmartMax | 9 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 |
| SPA-PRO | 8 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| hgigamail | 5 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Softalk | 5 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| TIMS | 3 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Isode | 3 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Oracle Beehive | 3 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| NPlex | 2 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| PMDF | 2 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| MuseMail | 1 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| TeamWARE | 1 | 0.00 | +-0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |