Security

Internal addresses: all@ and announcements@ only receive from the company

Your company's all@ address leaks onto a list and starts getting spam. Worse: an email arrives at all@ pretending to be from management and asking for an urgent payment. Addresses used only for internal communication do not need to accept messages from outside.

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Signing up is online and activation is automatic: pay by PIX and the account is ready in minutes for you to activate your domain. For questions, we answer on WhatsApp.

Alias list with the sender badge on each one: open, internal or restricted senders
The alias list, with a badge showing who can write to each one (real screen, fictional data).
  • Step by step in the manual
  • Support based in Brazil, in Portuguese

How to turn it on in the admin panel

  1. For a mailbox: Edit mailbox

    In the panel, check Only senders from the same domain.

  2. For an alias or group: Email → Aliases

    When creating or editing, check the same option, or fill in Allowed senders to allow only certain addresses or domains.

  3. Save

    Anything from outside is rejected on arrival, and the sender is told that the address is for internal use.

  4. Check it in the list

    Each alias has a badge that says who can write to it: open, internal or restricted senders.

Good to know

  • The rejection happens at the door: the outside message never even takes up space in the mailbox.
  • It applies per address, without changing anything else on the domain.
  • When a message passes through more than one alias or mailbox with a restriction, the strictest rule applies.
  • In the panel's message tracking, the rejection appears with the reason: the mailbox only receives from its own domain.
Step by step in the panel manual

Questions about internal-only addresses

What happens to someone who writes from outside?

The message is rejected on arrival, and the sender is told that the address is for internal use.

Can I allow just one supplier?

Yes. On the alias, fill in Allowed senders with the authorized addresses or domains.

Does it work for mailboxes, not just aliases?

Yes. In Edit mailbox, check Only senders from the same domain.

Does this change anything on the other mailboxes?

No. The rule applies per address, without changing anything else on the domain.

See also

Aliases and groups

Addresses like sales@ and billing@ that deliver to the right mailbox or to several people, without paying for an extra mailbox.

See how it works

Track an email

Search by address and see each step of the message: delivered, rejected with the reason, or queued. 180 days of history.

See how it works

Two-step verification

Besides the password, a code from the phone app or by email. The person turns it on themselves, with recovery codes.

See how it works
See all features

Want this working at your company today?

lua.email costs from R$ 8.90 per mailbox, with webmail and lua Colabora on all plans. Signup is online and activation is automatic: pay by PIX and the account is ready in minutes for you to activate your domain. For questions, we answer on WhatsApp.

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