Check a Domain for Email Deliverability: The Full Checklist

Check a Domain for Email Deliverability

Checking a domain for email deliverability means verifying its authentication records, reputation, and blacklist status to confirm mail sent from it will reach the inbox.

What to check

Four things, in order: authentication (SPF, DKIM, DMARC set and aligned), blacklist status (is the domain or its IP listed), reputation (complaint and bounce history), and a live spam-score test. A domain that passes all four is set up to deliver. A failure in any one explains a spam problem.

How to run the check

Confirm authentication with a checker, run a blacklist lookup, review google postmaster for Gmail reputation, and finish with a spam test email.

How Nitrosend does it automatically

Every verified sending domain gets a deliverability health object with a single headline state and four data layers, so the domain check is continuous rather than a manual audit. The compliance layer grades it against the 2026 bulk-sender requirements out of the box.

FAQ

How do I check a domain for email deliverability?

Verify its SPF, DKIM, and DMARC, check it against blacklists, review its reputation, and run a spam-score test. Passing all four means the domain is set up to deliver.

What makes a domain deliverable?

Aligned authentication, a clean blacklist status, a low complaint and bounce history, and content that doesn't trip spam filters.