# Why Do Your Emails Land in Spam? 8 Rules to Recover Deliverability

https://www.bihostnet.com/en/knowledgebase/article/why-emails-go-to-spam-deliverability-guide

## Understanding Modern Spam Filtering Engines

Major mailbox providers (Google, Microsoft, Yahoo) use behavioral analysis alongside technical authentication to decide whether emails reach the Inbox or Junk folder.

## 8 Essential Best Practices for Inbox Placement

1. **Authenticate with SPF, DKIM, DMARC:** Mandatory protocols enforced by Gmail and Yahoo.
2. **Avoid Trigger Words and ALL CAPS:** Subjects with "FREE", "ACT NOW", or excessive punctuation trigger automated flags.
3. **Maintain Text-to-Image Balance:** Single-image emails without accompanying HTML text closely mimic phishing patterns. Maintain at least 60% text.
4. **Never Use Purchased Lists:** Unsolicited recipients mark emails as spam, immediately destroying domain and IP reputation.
5. **Provide One-Click Unsubscribe:** Giving recipients an effortless way to opt-out prevents spam complaints.
6. **Warm Up New Domains/IPs:** Gradually increase daily sending volumes over several weeks.
7. **Verify with mail-tester.com:** Benchmark your spam score before dispatching bulk communications.