---
title: Email Deliverability
description: "### SPE Messages Are in the Email, But... If your SPE messages appear in test emails but customers aren't receiving them, the issue is email deliverability—not SPE. ### Improving Email Delivery #### Use SMTP Don't rely on default WordPress mail.…"
url: "https://smartproductemails.com/documentation/email-deliverability/"
updated: "2026-01-17"
category: Troubleshooting
---

# Email Deliverability

### SPE Messages Are in the Email, But...

If your SPE messages appear in test emails but customers aren't receiving them, the issue is email deliverability—not SPE.

### Improving Email Delivery

#### Use SMTP

Don't rely on default WordPress mail. Install an SMTP plugin:

- WP Mail SMTP
- FluentSMTP
- Post SMTP

Connect to a reliable email service:

- SendGrid
- Mailgun
- Amazon SES
- Postmark

#### Set Up Email Authentication

Add these DNS records:

- **SPF** — Authorizes sending servers
- **DKIM** — Verifies email authenticity
- **DMARC** — Tells receivers what to do with failures

#### Check Spam Folders

Always check spam/junk folders when testing.

#### Test Your Emails

Use [mail-tester.com](https://mail-tester.com/) to check your spam score.

### More Information

See our Best Practices guide: WooCommerce Email Optimization