Why Your Emails Are Going to Spam and How to Fix It

Email deliverability is not random. When your emails land in spam, something specific is triggering a filter — and almost every cause has a fix. The frustrating part is that you can write a perfect email and still have it disappear before anyone sees it, because the issue usually lives in the technical setup, not the content.

The deliverability rules that govern MONDAi are the same ones GoHighLevel users navigate — authentication records, sending domain reputation, and list hygiene practices that inbox providers use to decide what's real and what's junk. This guide walks through the most common culprits in order of impact.

The Most Common Causes

Fix 1: Authenticate Your Sending Domain

This is the highest-impact fix available. Without SPF, DKIM, and DMARC records on your sending domain, inbox providers have no way to verify you are who you say you are. Many default to spam.

Fix: Complete the email sending setup inside MONDAi — specifically the DNS authentication step. See How to Set Up Email Sending for the exact records needed.

Fix 2: Stop Sending from a Free Email Address

Sending from a Gmail, Hotmail, or Yahoo address through a platform like MONDAi is a significant spam signal. Use a branded sending address — yourname@yourdomain.com — and authenticate that domain.

Fix 3: Warm Up Your Sending Domain

A new sending domain with zero history that suddenly sends to 1,000 people looks suspicious. Complete the warm-up process before sending any campaigns. See How to Set Up Email Warm-Up.

Fix 4: Clean Your List

High bounce rates and low engagement signal to inbox providers that you're sending to people who don't want your emails. Remove addresses that have hard bounced and suppress contacts who haven't engaged in six months or more.

Fix 5: Review Your Email Content

Subject lines with excessive caps, certain high-risk words, image-heavy emails with minimal text, or emails without a plain text alternative can all trigger spam filters. Write subject lines like a real person. Keep your image-to-text ratio balanced. Always include a plain text version.

Fix 6: Include an Unsubscribe Link

This is both a spam trigger and a legal requirement under CAN-SPAM. Every marketing email must contain a visible, functional way to unsubscribe. MONDAi includes this in its email builder — use it on every broadcast.

Common Mistakes

• Fixing one thing and considering the problem solved. Deliverability is cumulative — fix all layers.
• Assuming content is the problem when the setup is broken. Check authentication first.
• Sending a large campaign before warming the domain.
• Not checking spam folders to diagnose the issue — full email headers tell you exactly which filter caught it.

Next Steps

• How to Set Up Email Sending — authentication fixes the majority of deliverability problems
• How to Set Up Email Warm-Up — the step that protects your new domain's reputation