Other email providers which respect much more users privacy can also do that. Such as protonmail.
Proton Mail is a very nice email provider, highly recommened. It also allows such redirects.
Protonmail is not respecting anything related with privacy of their customers, and they already gave up their user data and IP addresses to authorities in the past.
There are literally a bunch of examples when people got arrested ''thanks'' to protonmail, and they are probably just a another honeypot:
https://www.wired.com/story/protonmail-amends-policy-after-giving-up-activists-data/https://cyberinsider.com/protonmail-discloses-user-data-leading-to-arrest-in-spain/
PS
Same goes for their VPN and crypto wallet crap.