Mail and news settings

{| This article provides a short description of all the mail and news specific settings for Thunderbird. Most of that information should also apply to Mozilla Suite and SeaMonkey but there is no attempt to document that.
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This web page is just documentation, it can't be used to modify your settings. Use Tools -> Settings -> General -> Config Editor to modify the settings documented in this article.

'''Spaces were added on both sides of any dots in the settings name to let the words wrap. They don't exist in the actual settings.''' Editors need to be careful to follow this convention to avoid forcing readers to horizontally scroll this article.

A user may have multiple accounts, servers, and identities, each of which has a decimal id appended to the name. &quot;#&quot; is used to represent that. For example both mail.server.server1.ageLimit and mail.server.server23.ageLimit would be documented by mail.server.server#.ageLimit.

This article will always be incomplete. The &quot;mailnews.js&quot; file in the defaults\pref subdirectory in the Thunderbird program directory defines the default values for most of the mail and news settings. Those settings are shared by multiple applications. The &quot;all-thunderbird.js&quot; file in the same directory overrides some of those settings, and adds some settings unique to Thunderbird. These files are now physically stored within omni.ja (it was initially called omni.jar) to improve performance. You can examine its contents using any program that knows how to open a Zip archive file. Not every setting has a default value. These additional settings are supported but need to be added if you want to use them. Usually somebody finds out about them by reading bug reports where a developer mentions the setting and what release/build they would first occur in.

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Contents

 * 1 Calendar.
 * 2 Mail.
 * 3 Mailnews.
 * 4 News.
 * 5 Misc mail settings
 * 6 See also
 * 7 External links
 * }

News.


Misc mail settings
