Practical solution to not expose name of recipient of mail

Question

1. There are some e-mails where I do not just want to hide the content I am writing, but also the information, whom I write with.
2. I want to identify these people whose names I do not want to expose on my own PC = I want to save their email adresses under a certain name, which may or may not be their real name or parts of it, but a String atleast that I do not want to send unencrypted through the internet. I want to save these in an adress book the mail client should have access to, so I can use an autocomplete. Normally this means that the mail client also grabs the name of the contact and includes it in the mail draft as the name of the recipient. This is what I want to avoid.

Hustle-full solution: The solution obviously is to have the names and adresses saved somewhere, but to manually type the email adresses into the mail client, so that it does not transfer a name with the recipients address. This prevents the use of autocomplete, though.

Hustle-free solution: ...is what I'm asking for... Please help!

Answer 1

There are some e-mails where I do not just want to hide the content I am writing, but also the information, whom I write with.

From whom are you trying to hide this? This is a long-standing problem with PGP-encrypted emails - the metadata is not encrypted, and so a network eavesdropper can still gather information on who is talking to whom.

This isn't something you can solve while still using standard email, as the protocol is not designed to hide that information.

I want to identify these people whose names I do not want to expose on my own PC = I want to save their email adresses under a certain name, which may or may not be their real name or parts of it, but a String atleast that I do not want to send unencrypted through the internet.

If you're already going to be replacing the names with pseudonyms, why are you concerned with an eavesdropper seeing them? The name means nothing, and they can already use the recipient email address to create separate profiles for separate people.