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You can configure up to 25 alternate email addresses in Plain, letting you manage multiple support inboxes (e.g. support@, billing@, security@) from a single workspace. If you need separate queues across two workspaces on the same domain, this won’t apply, reach out to support@plain.com to set it up.

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How to set up alternate addresses

Go to Settings → Email and scroll to the Alternate addresses section. Each alternate address must:
  • Use the same domain as your primary support address. For example, if your primary is help@acme.com, valid alternates include billing@acme.com, but not billing@acme.io.
  • Be forwarded to Plain the same way as your primary address. By setting up a forwarding rule in your email provider or domain registrar pointing to your Plain inbound address. No additional DNS records are required; the DNS setup you completed for your primary address covers all addresses on the same domain.

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How alternate addresses work

Once configured:
  • Plain automatically replies from the address the customer originally contacted. A thread started by emailing billing@acme.com will use that address on all replies by default.
  • You can manually select any of your configured addresses when composing a reply, if you need to send from a different one.
  • The thread shows which address the customer contacted, so context is always clear to your team.

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Why use alternate addresses

  • Unify your workflows: manage all incoming support emails in one place without switching tools or accounts
  • Keep communication consistent: customers always receive replies from the address they used, automatically
  • Maintain branding across departments: use purpose-specific addresses like billing@ or security@ without complicating your setup