Looks for those wifi login pages when Thunderbird starts and opens a tab to login into the network so you can check your mail
Latest commit 77bd394 Oct 27, 2012 @clarkbw latest release version
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release latest release version Oct 26, 2012
README.md merging old code with the new restartless code Jun 17, 2011


This is a Captive Portal detector add-on for Thunderbird.

Captive Portals are those redirect pages you get when you first use the internet connection at an airport or hotel or public wifi spot. Often a captive portal is requesting agreement to a Terms of Service and/or payment for usage.

Thunderbird doesn't currently detect Captive Portals well because they are designed to redirect web HTTP traffic and not mail SMTP/POP/IMAP. So if you aren't using a web browser Thunderbird appears to not be able to connect to your email and until you browse the web you won't know why.

How it works

This is a standard system for detecting captive portals, send a request to a known location and watch to see if you are redirected.

  • On startup or when the network connection goes online: Open a hidden tab in the background
  • The tab is going to a known location and will show itself if it gets redirected before reaching it's known location

Development setup

  • git clone https://clarkbw@github.com/clarkbw/Thunderbird-Captive-Portal-Detector.git
  • cd Thunderbird-Captive-Portal-Detector/src/
  • pwd > tbcaptiveportaldetector@momo
  • mv tbcaptiveportaldetector@momo "YOUR THUNDERBIRD PROFILE DIRECTORY"
  • Start Thunderbird

Known Issues

  • javascript: links are not supported by Thunderbird and so you won't be able to continue if a page requires you click on those links.

New Issues

If you find a problem or a captive portal that wasn't detected correctly please file an issue in the github issue tracker. When filing please include the location and if possible the source code and URL of the problem portal page.