SendGrid Emails Going to Spam: Diagnosis & Fix for SendGrid Senders
Your SendGrid emails are landing in the spam folder
Fix within 24 hours.
Check SendGrid-specific settings:
In SendGrid, go to Settings > Sender Authentication
Verify your domain is "Verified" for DKIM and SPF
Check if SendGrid moved you to a different IP recently
Review bounce and complaint metrics in SendGrid Analytics
What Could Be Causing This?
SendGrid Domain Not Verified
Most CommonSendGrid requires domain verification (DKIM, SPF). Unverified domains trigger spam filtering.
How to confirm:
Go to SendGrid Settings > Sender Authentication. Look for green checkmarks next to your domain.
SendGrid Shared IP Pool Reputation Issue
Most CommonSendGrid shared IP pools can be damaged by other senders on the pool.
How to confirm:
In SendGrid, check your IP pool assignment (Settings > IP Addresses). Contact SendGrid support to check pool reputation.
SendGrid Account Flagged for Abuse
CommonIf SendGrid detects spam complaints or high bounce rates, they may restrict sending or move you to a problematic pool.
How to confirm:
Check SendGrid Alerts or notifications. Contact SendGrid support if you see warnings.
Fix Playbook
Step 1: Verify Domain in SendGrid
- In SendGrid, go to Settings > Sender Authentication
- Add your domain if not listed
- Follow the verification prompts (SendGrid provides DNS records)
- Publish DNS records (DKIM, SPF) for your domain
- Wait for SendGrid to verify (5 min to 48 hours for DNS propagation)
- Once verified, all future sends will authenticate properly
SendGrid-Specific Note:
SendGrid provides step-by-step verification UI — easier than manual DNS.
Step 2: Request Dedicated IP in SendGrid
- If you send 100K+/month, contact SendGrid and request dedicated IP
- SendGrid will provision and help you warm up
- Warm-up takes 7-10 days with gradual volume increase
- Dedicated IP isolates you from shared pool reputation issues
SendGrid-Specific Note:
SendGrid dedicated IPs include warm-up support and monitoring.
Step 3: Review & Clean SendGrid Suppressions
- In SendGrid, go to Suppressions to review bounces and complaints
- Hard bounces are auto-suppressed — verify they're listed
- Remove any false suppressions if appropriate
- Monitor SendGrid Analytics for bounce and complaint rates
SendGrid-Specific Note:
SendGrid manages suppressions automatically, but you can review them manually.
Prevention Checklist
- Keep SendGrid domain verified (check monthly)
- Monitor SendGrid Analytics bounce and complaint rates
- Don't send to purchased lists without validation
- Use SendGrid segmentation to target engaged subscribers only
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