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Omnisend Emails Going to Spam

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Ongoing Web Updated November 13, 2026Based on 4 user reportsHow we research

Quick answer

Omnisend spam placement usually traces back to domain authentication, a mismatched From address or sending to a cold list. Authenticate your domain, match the sender address and warm up gradually.

Most likely fix: Authenticate your domain

How to fix it

Try these in order — the most common fix is first.

  1. 1. Authenticate your domain

    1. Open Store Settings > Domains
    2. Add the DKIM and SPF records Omnisend shows at your DNS host
    3. Add a DMARC record (p=none to start)
    4. Wait for DNS propagation and verify in Omnisend
    Did this fix it?

  2. 2. Match the sender address

    1. Use a From address on exactly the authenticated domain
    2. If you authenticated a subdomain, use that subdomain in the From address
    Did this fix it?

  3. 3. Warm up and clean the list

    1. After migrating, send first to your most engaged contacts
    2. Increase volume gradually instead of mailing everyone at once
    3. Remove hard bounces and long-inactive contacts
    Did this fix it?

  4. 4. Monitor reputation

    1. Set up Google Postmaster Tools for your sender domain
    2. In Gmail use Show original to confirm DKIM passes and the signing domain matches
    Did this fix it?

Symptoms

Campaigns or automations land in spam or Promotions, or open rates drop after switching to Omnisend.

Why it happens

  • SPF, DKIM or DMARC not set up for your sending domain
  • From address domain differs from the authenticated domain or subdomain
  • Whole list emailed on day one after migration
  • Domain reputation damaged by earlier bulk sending
  • High complaint or bounce rates

This guide also covers

  • omnisend emails going to spam
  • omnisend deliverability
  • omnisend dkim

Still not working?

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