Domains and addresses

How a leader adds the team's domain with two DNS records, gives members their addresses, and what mail on the domain can do.

A team's mail lives on the team's own domain, such as alnoor.example. A leader adds the domain on the team's Mail tab, proves it with DNS records, and then gives each person an address on it. The tab is there while the team has Mail on (the General tab).

Adding a domain

1. On Mail, press Add domain, type the domain and press Add.
2. The tab shows two records to add at your DNS provider, in a table of Type, Name, Value and State. Press a value to copy it.

3. Wait, then press Check again. Each record's State says Found, Partly found, Not yet, Another value or Not checked.

DNS changes take time to spread, usually up to an hour. Theorem also checks by itself: every five minutes for a domain's first two days, then every hour until it is 30 days old. Check again asks at once, at most once in ten seconds.

The domain is the team's once the TXT record is seen. Once every record is found, the domain says Verified. Until then its line says where it stands, such as Waiting for its records or Proved. Not receiving yet.

• A team may hold 5 domains.
• A domain can be held by one team at a time. Until a team proves it, two teams may both add it: the first to prove it has it, and the other then sees Another team has proved it. Once it is proved, another team's Add is refused.
• A domain can't be added while people sign in to Theorem with an address on it, or are invited at one, because their sign-in links would then arrive in a mailbox they must be signed in to read. The refusal says how many people, never who.
• The MX record sends the domain's mail to Theorem. If the domain receives mail elsewhere today, that mail comes to Theorem instead once the record is in place.

Giving addresses

Once a domain is proved, the tab lists the team's people under Addresses: every member, and everyone still invited. In a person's row menu, choose Give an address, type the part before the @ and choose the domain.

• 3 to 32 characters of a to z and 0 to 9, with a single ., - or _ between them.
• postmaster and abuse can't be given: mail to them reaches a leader's mailbox on that domain.
• One address per person on a domain. Nobody chooses their own.

The mailbox is made at once, so mail can arrive before the person first comes.

When people leave

An address stays with the team when its person leaves. Its row then says Not in the team, and Give it to someone else hands the mailbox, with its mail, calendar and contacts, to another person. Take it back removes an address given by mistake, only while its mailbox is empty, and cannot be undone.

What mail on the domain can do

Mail on a team's domain is received from anywhere. It can be sent only to addresses on domains Theorem hosts: the tab says Mail from it can only go to addresses on Theorem for now. See Mail.

A domain can be removed with Remove domain only when no address is on it, a person's or a role's. An address whose mailbox holds mail stays with the team, and so does its domain.