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Thunderbird Email Online

Thunderbird Web Browser

AutoarchiveReloaded

Rated 4 out of 5 stars(15)

Automatically archives old mails (Improved version of the orginal Autoarchive Add-on)

by Brummolix

SmartTemplates

Rated 4 out of 5 stars(72)

SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.

by Realraven (Axel Grude), Marky Mark DE

XNote++

Rated 5 out of 5 stars(107)

Persistent sticky notes for Thunderbird associated to mails.
In TB 78, you can define the note position in the settings. If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.

by Lorenz Froihofer, opto

*cloud - FileLink for Nextcloud and ownCloud

Rated 5 out of 5 stars(20)

Upload large attachments to your Cloud and send the link by email

by Johannes Endres

CardBook

Rated 4 out of 5 stars(338)

A new Thunderbird address book based on the CardDAV and vCard standards.
Twitter: @CardBookAddon

by Philippe V.

DKIM Verifier

Rated 4 out of 5 stars(30)

Verifies the DKIM-Signature of an e-mail.

by Philippe Lieser

Mozilla Thunderbird Sign In

1. Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!
2. Mozilla Thunderbird. Start Thunderbird. From the Tools menu, select Account Settings. Select Outgoing Server from the left menu. Highlight the email account you want to edit and click Edit. Make sure the Allow insecure authentication option is unchecked. From the Connection security drop-down menu, select the desired option: SSL or none.