Fix email deliverability with SPF, DKIM, DMARC

Three DNS records that determine whether your mail lands in the inbox or the spam folder. Hosters.pk auto-publishes them when you activate a mailbox — this article explains how to verify and customise.

SPF (TXT on apex)

v=spf1 include:_spf.new.hosters.pk ~all

Authorises our mailservers to send on your behalf. Add include: entries for any other ESPs you use (SendGrid, Mailchimp, etc.).

DKIM (TXT on default._domainkey)

Auto-generated per mailbox. Signs outbound mail with a 2048-bit key. Rotate every 6 months automatically.

DMARC (TXT on _dmarc)

v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; pct=100

Tells receivers what to do with mail that fails SPF + DKIM. Start with p=none for 2 weeks, monitor reports, then ramp to quarantine and reject.

Verify your setup

Send a test mail to check-auth@verifier.port25.com. You get back a full report within seconds. All three should pass.