High email deliverability is critical for your campaigns to reach the inbox instead of the spam folder. Follow these best practices.

DNS Authentication Records

Configure these DNS records for your sending domain:

  • SPF: Specifies which servers are allowed to send email for your domain.
  • DKIM: Adds a cryptographic signature to every outgoing email.
  • DMARC: Tells receivers what to do if SPF or DKIM fails.

Example SPF record: v=spf1 include:yourmailprovider.com ~all

List Hygiene Best Practices

  • Remove bounced emails immediately after each campaign.
  • Honor unsubscribe requests within 24 hours.
  • Avoid purchasing email lists — use only opted-in contacts.
  • Re-engage inactive subscribers before removing them.

Content Best Practices

  • Maintain a text-to-image ratio of at least 60:40.
  • Avoid spam trigger words: "Free!!!", "URGENT", "Act Now".
  • Always include a physical mailing address in the footer.
  • Include a clear, one-click unsubscribe link.
💡 Pro Tip: Warm up a new sending domain gradually — start with 50 emails/day, double every week until you reach your target volume. Sudden high volume from a new domain triggers spam filters.