What this is
A breakdown of the most common reasons emails land in spam instead of the inbox.
Why it matters
Even small issues can drastically reduce your inbox placement and campaign performance.
The 5 most common causes
1. Domain or IP reputation issues
If your domain or sending IP has a poor history, inbox providers will filter your emails more aggressively.
2. Incorrect DNS setup
Missing or misconfigured SPF, DKIM, or DMARC records signals low trust.
3. Sending too much too quickly
Sudden spikes in volume can trigger spam filters, especially on new domains.
4. Low-quality email lists
Invalid, outdated, or purchased lists lead to bounces and complaints.
5. Spam-triggering content
Certain phrasing, formatting, or link structures can increase filtering risk.
What to do
Fix your DNS configuration first
Reduce sending volume and increase gradually
Clean your email list
Review your email content for spam signals
Monitor your results and adjust over time
When to get help
If issues persist, you may need a deeper technical review.