Aliases · Updated 15 October 2026

Making and using aliases

An alias is an extra email address that delivers to your inbox. Give each company its own, and you'll always know who an email came through.

Making an alias

Choose New alias and fill in:

  • Name: what you'll call it, like "Tunebox".
  • Given to: the company's website, like tunebox.com. This is who's expected to write to it.

You'll get an address like tunebox.k7f2wq@yellowbird.email. The six characters at the end make it hard to guess. You can also use the shorter ybrd.me domain. Pick your default in Settings → Aliases.

Free accounts can have 10 active aliases. Blocked aliases don't count.

Custom aliases

On the paid plan you can also make up to 10 custom aliases, where you pick the whole name before the @ yourself. Make one in Settings → Aliases: type the name, choose the domain and select Create.

Names are 3 to 30 lowercase letters, digits and single dots. Some names are reserved, and each name can only belong to one person.

A custom alias isn't given to any one company, so it takes mail from anyone, straight to your inbox. It never leaks, and it can't be blocked or replaced. You can rename or delete it like any other alias. Deleting it is permanent: nobody can use that address again, including you.

Renaming an alias

Change an alias's name on its page, or choose Rename from its menu in the list. Only you see the name. The address stays the same.

Reading alias mail

Mail to an alias goes straight to your inbox, tagged with the alias it came through. It's never screened: the alias already tells you who it should be from.

Replying from an alias

Replies go out from the alias the email came to, so the company only sees the address they already have. When you write a new email, choose which address it's from.

Each alias has its own Name on mail you send. Leave it empty to send without a name. It can have its own signature too. See Sending mail.

Exporting your aliases

Download all your aliases as a spreadsheet (CSV) from Settings → Account. See Exporting and deleting your data.