It's getting to be that there are very few places where you can reach an audience of millions that are not heavily censored by a small number of giant, unaccountable corporations.
Email is the last one, and already Google is starting to censor that one, too, by rewriting links in messages to go to google.com instead of the original email as sent.
In gmail's web interface they have ~always done this. In IMAP-accessed accounts, they are doing it if you have advanced protection turned on for your Google Account.
It breaks PGP signatures, among other things.
There's no way I found to turn it off, and there was no announcement that they were starting.
I submitted it around the day it started (~2 months ago) but my submission was flagged.
Probably for protection against malware and phishing. Huh, Outlook 365 has been doing this for a while (it prefixes the url with its domain), I've only realized now how privacy-breaching it is.
Email is the last one, and already Google is starting to censor that one, too, by rewriting links in messages to go to google.com instead of the original email as sent.