Is this email legit?

[tom80H]

Yes, it is.
Also see the same message in the pinned announcement at the top of the forum

Important notice of a potential data breach 24th of August 2022

We want you to be aware of an incident on 2022-08-22 involving your Plex account information. While we believe the actual impact of this incident is limited, we want to ensure you have the right information and tools to keep your account secure. What happened On Monday (2022-08-22), we discovered suspicious activity on one of our databases. We immediately began an investigation and it does appear that a third-party was able to access a limited subset of data that includes emails, usernames, an…