Add-ons
Unwrap Signature 0.3.1
by MichaelG1967
Unwraps a signed message from signature syntax (multipart/signed -> multipart/mixed), allowing Thunderbird to detach or delete attachments.
About this Add-on
Purpose:
This add-on frees saved messages from a signature. This is useful for detaching or deleting attachments from signed messages. Thunderbird locks these functions as long as a message is signed. This behavior of Thunderbird is discussed, for example, at <https://support.mozilla.org/en-US/questions/1227052>.
How it works:
The add-on makes attachment processing available by changing the header entry "Content-Type: multipart/signed" to "Content-Type: multipart/mixed" and removing the associated parameters.
Usage: After installing the add-on, a new "Unwrap Signature" button is located in the header of the message display pane (see screenshots). If the add-on detects a signature, the button is active; otherwise, it is not. A tooltip informs you about what the add-on detects. Clicking the active button executes the add-on. Afterwards, the signature should only appear as a simple file attachment among the other attachments. Thunderbird now treats the message as an unsigned message and allows the detaching and deleting of attachments.
Relationship to the former "Disable Signature":
This add-on replaces a previously available add-on "Disable Signature" <https://services.addons.thunderbird.net/En-uS/thunderbird/addon/disable-signature/>, which was only supported up to Thunderbird 73.0. However, there is no connection to "Disable Signature". The functions have been reprogrammed here in a simplified form (using Gemini).
This add-on frees saved messages from a signature. This is useful for detaching or deleting attachments from signed messages. Thunderbird locks these functions as long as a message is signed. This behavior of Thunderbird is discussed, for example, at <https://support.mozilla.org/en-US/questions/1227052>.
How it works:
The add-on makes attachment processing available by changing the header entry "Content-Type: multipart/signed" to "Content-Type: multipart/mixed" and removing the associated parameters.
Usage: After installing the add-on, a new "Unwrap Signature" button is located in the header of the message display pane (see screenshots). If the add-on detects a signature, the button is active; otherwise, it is not. A tooltip informs you about what the add-on detects. Clicking the active button executes the add-on. Afterwards, the signature should only appear as a simple file attachment among the other attachments. Thunderbird now treats the message as an unsigned message and allows the detaching and deleting of attachments.
Relationship to the former "Disable Signature":
This add-on replaces a previously available add-on "Disable Signature" <https://services.addons.thunderbird.net/En-uS/thunderbird/addon/disable-signature/>, which was only supported up to Thunderbird 73.0. However, there is no connection to "Disable Signature". The functions have been reprogrammed here in a simplified form (using Gemini).
