# lists.example.com

← All inbound domains

## DNS status ok

Cached a few minutes — use Re-check after publishing. Unlike outbound, inbound needs an MX pointing at this server.

MX ok
Host / name lists.example.com
Type MX
Value 10 mail.example.org. 20 mail.primary.example.net.

An MX points at mail.example.org (this server). Other MX values are the domain’s own primaries — they are not an error.

## Upstream

Where accepted mail is handed off. Not a mailbox.

Host Port TLS to upstream

## MX record to publish

Add this MX so the internet delivers here. Keep any existing primary MX if this is backup-MX.

Host / name
lists.example.com
Type MX
Value
10 mail.example.org.

## Valid recipients

Who this domain accepts on port 25. Same idea as an application’s address mode: a list, or any address at the domain.

Who to accept
Addresses (one per line or comma-separated) staff@lists.example.com postmaster@lists.example.com abuse@lists.example.com

Unknown recipients are rejected at RCPT so this relay does not generate backscatter.

Every address at this domain is accepted and forwarded. Prefer a list unless the upstream rejects unknowns — otherwise this relay may generate backscatter.

## Danger zone

Stops accepting mail for this domain. Does not touch outbound sending domains.

Delete inbound domain