Signed pdf attachment file names malformed once downloaded to a Windows computer
When downloading an attachment where the file name is in Hebrew, Yahoo doesn't retain the file name but instead malforms it (including extension) on Windows platform.
Example:
Original file name (as appears in Yahoo web mail preview):
" 2021-44089593720210622204628.pdf"
Downloaded file name:
=UTF-8BMjAyMS00OTEyNzk1NjBfMjAyMTA5MDFfMTgwMTM4LnBkZg===
After running base64 decode on the <encoded-file-name> part of the downloaded file name, i.e.: =UTF-8B<encoded-file-name>=
Then the result is the original file name.
The issue happens only with signed pdfs, although I wasn't able to reproduce it using a pdf that I personally signed.
It happens with pdf sent from Israel Electric Company, insurance companies, etc'.
Also, it happens when the message: "We are having trouble previewing this file." is displayed in the preview window.
See screenshot here: https://i.imgur.com/o8l82jz.png
See malformed file name screenshot here: https://i.imgur.com/9tquR9Y.png
It happens on latest version of Chrome or Firefox, on Windows 10 Enterprise or Windows 10 Professional.
It doesn't happen when using the Yahoo mail native iPhone app (iPhone 12).
I can provide a sample pdf file to the support team once contacted privately.
Ohad Netz
shared this idea
Hi there,
Could you please message us on Twitter at @YahooCare or on Facebook at Yahoo Customer Care? We'd like to look more into the issue you're experiencing. In case you do not have a social media account, we are also available at: help.yahoo.com
Looking forward to your reply!
Thank you,
Yahoo Mail team