On email aliases:
- Don’t use them for anything sensitive
- They are great for compartmentalizing the inbox
- Having your primary email everywhere will just get you spam / more likely that your email gets into cold email lists.
- Use temp emails for one time stuff. Or just give random to see if they don’t confirm.
- Having a same email on websites can help them infer your identity.
Services I like for this- Addy, simplelogin, forward email vanity domains.
Your primary email shouldn’t contain your last name at least, maybe not even your first name.
Aliases give you more email id’s, so you can use them as new identities for stuff.
Have at least 2 proton mailboxes, one for finances, other for everything else.