Email deliverability is the chance that your message reaches the inbox instead of spam. Big providers now reject mail that cannot prove where it came from. Three DNS records solve most problems: SPF, DKIM and DMARC. Together they show that your domain really sent the message.
SPF: who may send
SPF is a TXT record that lists the servers allowed to send mail for your domain. A receiving server compares the sender with this list. Keep only one SPF record per domain. If you use several services, merge them into a single line.
DKIM: a digital signature
DKIM adds a signature to every message. The public key sits in your DNS, and the private key stays on the mail server. If someone alters the message on the way, the signature fails. Most control panels generate the DKIM record for you in one click.
DMARC: the policy
DMARC tells receivers what to do when SPF or DKIM fail. Start with a policy of none to collect reports. After a few weeks, move to quarantine and then reject. Reports show who sends mail with your name, including fraudsters.
Improve email deliverability step by step
- Publish one SPF record that covers every sending service.
- Enable DKIM in your hosting or mail panel.
- Add a DMARC record with a report address.
- Send from a real mailbox, not a no-reply address.
- Keep your lists clean and remove bounced addresses.
Our business email plans include SPF and DKIM by default. You only need to add DMARC.
Watch your reputation
Deliverability also depends on behaviour. Sudden bulk sends, misleading subjects and many complaints hurt your score. Warm up new domains slowly. Send content people asked for, and make unsubscribing easy.
Check your records with a DNS lookup after every change. Small errors are easy to fix once you see them.
Test before you send
Send a test message to a few personal addresses at different providers. Open the original message and look for passed checks. If one test fails, fix it before your next campaign. It is much easier to protect a good reputation than to repair a bad one.
