Why Are My Emails Going to Spam? 12 Fixes That Actually Work (2026)

Nothing kills email marketing faster than landing in spam. If your emails are going to junk folders, here are 12 fixes that actually work — organized from most impactful to least.

Fix #1: Set Up Email Authentication (Most Important)

This is the #1 reason emails go to spam. Without authentication, inbox providers can’t verify you’re a legitimate sender.

What to set up:

1. SPF — Lists servers authorized to send from your domain
2. DKIM — Adds a digital signature to verify email integrity
3. DMARC — Tells receivers how to handle unauthenticated emails

How: Add DNS records to your domain. Your email platform (Brevo, Mailchimp, etc.) provides the exact values.

See our complete SPF/DKIM/DMARC guide.

Fix #2: Use a Reputable Email Service

Sending from Gmail, Outlook, or your web host’s SMTP? That’s likely part of the problem.

Why: Shared IPs on cheap hosting often have bad reputation from other users’ spam.

Fix: Use a dedicated email service like Brevo (free) that manages sender reputation and provides authentication.

Fix #3: Clean Your Email List

High bounce rates destroy sender reputation. ISPs see bounces as a sign you’re sending to harvested/purchased lists.

How to clean:

• Remove hard bounces immediately
• Re-verify addresses older than 6 months
• Use an email verification service
• Remove consistently unengaged subscribers

See our email list cleaning guide.

Fix #4: Check Blacklists

Your IP or domain might be on a blacklist.

How to check: Use MXToolbox or our blacklist guide

How to fix: Submit removal requests to each blacklist. Fix the root cause (usually high complaints or bounces).

Fix #5: Reduce Spam Complaints

If more than 0.1% of recipients mark you as spam, ISPs will start filtering all your emails.

Fixes:

• Make unsubscribe link visible and easy
• Only send to opted-in contacts
• Set expectations at signup (frequency, content type)
• Honor unsubscribes immediately

Fix #6: Avoid Spam Trigger Words

While less impactful than authentication, certain words and patterns increase spam scores:

Avoid in subject lines:

• ALL CAPS
• Excessive punctuation!!!
• “Free!!!”, “Act now!”, “Limited time”
• “Congratulations”, “You’ve won”
• “Click here”, “Open immediately”

Fix #7: Balance Images and Text

Emails that are mostly images (or a single image) trigger spam filters.

Best practice: 60% text, 40% images. Always include alt text on images.

Fix #8: Include Physical Address

CAN-SPAM requires a physical mailing address in every commercial email. Missing it can trigger spam filters.

Fix #9: Use a Consistent “From” Address

Changing your sender name/address frequently confuses ISPs and recipients.

Best practice: Use a consistent sender like “[email protected]” for campaigns.

Fix #10: Warm Up New Domains/IPs

Sending 10,000 emails from a new domain on day one will trigger every spam filter.

Warm-up schedule:

• Week 1: 50-100/day to most engaged subscribers
• Week 2: 200-500/day
• Week 3: 1,000-2,000/day
• Week 4+: Increase 50% weekly

Fix #11: Monitor Engagement Metrics

Low engagement signals to ISPs that people don’t want your emails.

Track:

• Open rate — Below 15% is concerning
• Click rate — Below 1% needs attention
• Bounce rate — Keep under 2%
• Complaint rate — Keep under 0.1%

Fix #12: Use Gmail Postmaster Tools

If Gmail is your biggest recipient, use Google Postmaster Tools (free) to see:

• Domain reputation
• IP reputation
• Authentication success rate
• Spam rate

Quick Diagnostic Checklist

• SPF record set up correctly?
• DKIM record set up correctly?
• DMARC record set up?
• Using a proper email service (not Gmail/host SMTP)?
• Bounce rate under 2%?
• Complaint rate under 0.1%?
• Not on any blacklists?
• Consistent sender address?
• Physical address included?
• Easy-to-find unsubscribe link?
• Good image-to-text ratio?
• No spam trigger words in subject?

If you checked “no” on any item above, that’s likely your issue. Start from the top and fix in order.

Related Guides

• Email Deliverability Complete Guide
• SPF DKIM DMARC Setup
• Email Spam Test Guide
• Email Blacklist Check Guide