[sneak]

If only there were some convenient software for keeping track of your unique login names and passwords for each site you use.

[xdrosenheim]

If you mean password manager, sure. But I was thinking of e-mails received, how would I know if the emails came from the "right" sites? Would have to open up a text file, or login to my password manager, just to check. I do not think that is a great way to keep track of it.

[joshka]

Seen masked email integration in 1password https://1password.com/fastmail/ Or iCloud https://support.apple.com/en-us/HT210425