Link to the mentioned story:

https://www.occrp.org/en/investigation/telegram-the-fsb-and-the-man-in-the-middle

I would say the link is bit more tenuous than you would present it. A Russian guy works for telegram with one of his businesses. Other businesses he owns are suspected of working with FSB.

To be sure, Telegram is most likely not very trustworthy but I thought that the fact they developed their own crypto would be suspicious enough so that people wouldn’t use it for sensitive information. Still it has not be confirmed that Telegram’s infrastructure is run by FSB.

I assume this is just a joke… Because with the relationship Telegram has with the Russian government this would be quite unlikely.

What you can probably do is create an encrypted archive and selecting the checkbox that hides filenames. It’s what I usually do in that type of case.

It should prevent gmail from knowing what is in the archive.