ZipMail for Yahoo is a Zip compression utility for the users of Yahoo Mail. ZipMail for Yahoo adds transparent Zip attached file compression (and decompression) features to Yahoo! Mail and includes features like Secured Notes and attached file encryption enabling to improve Yahoo! Mail privacy.
Once ZipMail for Yahoo is installed, the files you attach to your Yahoo messages are automatically and transparently compressed into industry-standard Zip files, saving significant amounts of network bandwidth and disk space while increasing attached file upload / download speed.
The key point is that there is absolutely nothing special to do in order to compress your Yahoo Mail attached files, ZipMail is fully transparent and automatic!
To encrypt your Yahoo attached files, simply enter a password in the password field displayed at the bottom of the attached file selection dialog.
ZipMail will then display a password confirmation dialog before to encrypt the resulting Zip file using your password to generate the encryption key.
The recipient(s) of your attached Zip file will have to provide this password in order to access/decompress the file.