Mail Deliverability checks and sets up the DNS records that let other mail servers trust mail sent from your server.
Where
Admin panel → Email → Mail Deliverability.
What it checks
- SPF – the TXT record that authorises your server to send for a domain.
- DKIM – the signing key and its public DNS record (per domain).
- DMARC – the policy record that ties SPF and DKIM together.
- PTR (reverse DNS) – that the server IP resolves back to its hostname.
Each domain gets a pass/fail status; missing SPF/DKIM/DMARC records can be created from here. A green result on all four is what inboxes expect before they trust your mail.