I usually do not zip attachments that I send with Thunderbird, it is normally just to much work to zip the files locally and attach them to the mail afterwards. It happens sometimes that I do not zip a php file and send it to someone who gets only garbage because of the way the attachment is processed. I did find an extension for Thunderbird that is perfect for lazy people like me who do not want to go the extra mile just to zip attachments.
Auto Zip Attachments does exactly what the name applies. It adds an AutoZip button to Thunderbird which adds all attachments to an compressed archive, removes the files from the list of attachments and adds the compressed file instead to it. The AutoZip icon will be visible in every compose mail window in Thunderbird. You may override the default behavior of the extension and customize it to suit your needs.
Instead of compressing all attachments into one file you may choose to compress them in separate files or group files of the same type in the same zipped files. It is possible to activate the option to zip files automatically when sending and to prevent that certain file types get zipped at all.
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Handy for clients who filter exe files by default so you don’t have to zip them by manual anymore.
Thank you for Auto Zip Attachment, unfortunately it doesn’t work with Thunderbird V2 RC1, can you advise time scales for your compatible version.
Thanks