Smart P7M Support

Smart P7M Support is an extension for Thunderbird that enables users to handle P7M attachments effortlessly. This extension has been built after a series of thorough tests to fine-tune its functionality. P7M attachments are files that contain a digital signature to confirm the sender's identity. It is essential to note that Thunderbird considers only the attachment type (content-type) to classify attachments with type application/pkcs7-mime or application/x-pkcs7-mime.

Thunderbird automatically verifies signatures and shows attachments in positive cases; however, in some cases, the verification process fails, and attachments are hidden, even after importing new certificates.

The installation process of Smart P7M Support is quite simple. Firstly, users can right-click the link provided and choose "Save Link As..." to download it to their hard disk. Secondly, in Thunderbird, they can open Add-ons from the Tools menu. Thirdly, they can click the "Install" button and locate/select the downloaded file and click "OK."

In summary, with the Smart P7M Support extension, Thunderbird users can handle P7M attachments with ease, avoiding the risk of hidden attachments and ensuring the sender's identity is verified through digital signatures. The installation process is straightforward, and the benefits of using Smart P7M Support are numerous.