Create a key to copy examples filled with your team.
How do I avoid MX conflicts?
Point inbound.your-domain at PostShiba. Leave the root MX alone.
Receiving uses MX on inbound.{domain}, not on the root. Keep the root MX on Google, Microsoft, or whoever already owns the mailbox. Do not point the sending domain's MX at PostShiba.
What to publish
| Host | Record |
|---|---|
example.com |
Leave the existing MX alone. |
inbound.example.com |
MX to the PostShiba inbound host shown on the inbox. |
mail.example.com |
No PostShiba MX. This is a sending domain. |
A domain-bound inbox address looks like agent@inbound.example.com. Hosted inboxes skip MX and land on our inbound zone.
MX on the sending domain steals mailbox mail. PostShiba never needs that record.