Why My Emails Are Going to Spam (And How to Fix It in 24 Hours)

If your emails are landing in spam, the cause is almost always one of five infrastructure issues. Here is a systematic diagnostic framework to identify and fix the root cause within 24 hours.

Seeing your carefully crafted emails land in the spam folder is frustrating. But the problem is rarely your content. In 500+ email audits, I've found that spam placement is almost always caused by infrastructure issues — not subject lines or copy.

The 5-Hour Diagnostic Framework

Hour 1: DNS Authentication Check

Verify your SPF, DKIM, and DMARC records. Use MXToolbox or a similar tool to check: Is your SPF record published? Does it include all authorised senders? Is your DKIM key valid? Is your DMARC policy set to at least p=none with a reporting address?

Hour 2: Blacklist Scan

Check your domain and IP on MXToolbox Blacklist Check. If listed on Spamhaus, Barracuda, or SORBS, follow our delisting guide before proceeding.

Hour 3: Sender Reputation Audit

Set up Google Postmaster Tools. Check your domain reputation, IP reputation, and spam complaint rate. If complaint rate exceeds 0.3%, your emails will be filtered regardless of content quality.

Hour 4: List Hygiene Scan

Review your recent bounce rates. If hard bounces exceed 2%, your list contains invalid addresses. Check engagement: if more than 50% of your list hasn't opened in 90 days, you're sending to dead contacts.

Hour 5: Content & Infrastructure Audit

Check image-to-text ratio (too many images triggers spam filters). Verify your sending domain matches your From address (DMARC alignment). Check shared IP reputation if on an ESP's shared pool.