For everyone who does this: I always wonder about using the same mydomain.com for many services. Because at least one reason for doing the aliasing is privacy,

For everyone who does this: I always wonder about using the same mydomain.com for many services. Because at least one reason for doing the aliasing is privacy, and by using the same domain for multiple services, even with a different 'name' (before the @ sign), you are offering the companies ability to cross reference to other sites they partner with/have a data leak as to how users are using the app. Worst, if you do use your real name within one of the services, you would potentially be revealing that anyone who uses @mydomain.com is that person, even if you didn't give that other service personal data within their app. Sure a malicious party could expect mydomain.com hosts many users, but you kind of make it obvious it's a catchall by doing things like using randombusinessname@mydomain.com. Thoughts? One solution is manually making a new alias @fastmail.com for each service you want to give a unique email. Edit: spelling