Title: Design Cart SMTP
Author: Paweł Nosko
Published: <strong>August 16, 2026</strong>
Last modified: August 16, 2026

---

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# Design Cart SMTP

 By [Paweł Nosko](https://profiles.wordpress.org/giraffex/)

[Download](https://downloads.wordpress.org/plugin/design-cart-smtp.1.0.0.zip)

 * [Details](https://wordpress.org/plugins/design-cart-smtp/#description)
 * [Reviews](https://wordpress.org/plugins/design-cart-smtp/#reviews)
 *  [Installation](https://wordpress.org/plugins/design-cart-smtp/#installation)
 * [Development](https://wordpress.org/plugins/design-cart-smtp/#developers)

 [Support](https://wordpress.org/support/plugin/design-cart-smtp/)

## Description

Most SMTP plugins confirm that a test message left the server. Shop owners still
do not know why an order email failed.

Design Cart SMTP is a diagnostic SMTP layer for WordPress and WooCommerce. It sends
mail through an authenticated mailbox, then shows what the mail server actually 
answered.

Author: [Paweł Nosko](https://www.designcart.pl/pawel-nosko.html) / [Design Cart](https://www.designcart.pl/)

Documentation: [How to configure SMTP in WordPress](https://www.designcart.pl/laboratorium/355-jak-skonfigurowac-smtp-w-wordpress-darmowy-plugin-testowaniem-polaczenia.html)

#### What makes it different

 * Mapped SMTP errors (authentication, TLS, connection, certificate, sender/relay,
   recipient, rate limit) instead of a generic failure
 * Full SMTP transcript (password redacted) plus the raw PHPMailer message
 * WooCommerce-style test using the store email wrapper — no fake orders
 * Send log of the last 100 messages with source (WordPress / WooCommerce / test)
   and error text
 * Presets for Gmail, Outlook, and Polish hosts (home.pl, nazwa.pl, OVH, cyber_Folks)
 * Force From so the WooCommerce envelope matches the SMTP mailbox
 * WooCommerce HPOS compatible; templates stay in WooCommerce  Settings  Emails

This plugin only changes transport. It does not replace WooCommerce email templates
or marketing mail tools.

## Installation

 1. Upload the `design-cart-smtp` folder to `/wp-content/plugins/`.
 2. Activate the plugin from the **Plugins** screen.
 3. Go to **Settings  Design Cart SMTP**.
 4. Enter your SMTP details, enable SMTP, and send a test email.
 5. Read the mapped errors, PHPMailer message, and SMTP transcript if the test fails.

## FAQ

### How is this different from other SMTP plugins?

The focus is diagnosis, not another settings form. A failed send returns mapped 
SMTP errors, the PHPMailer message, and a password-redacted transcript. WooCommerce
shops also get a store-style test and a send log that records which email type failed.

### Does it work with WooCommerce?

Yes. WooCommerce sends mail through wp_mail(). This plugin configures PHPMailer (
SMTP), can force the From header, and can send a WooCommerce-style test without 
creating an order.

### Can I edit store email content here?

No. Templates and per-email toggles stay in **WooCommerce  Settings  Emails**. This
plugin only changes transport.

## Reviews

There are no reviews for this plugin.

## Contributors & Developers

“Design Cart SMTP” is open source software. The following people have contributed
to this plugin.

Contributors

 *   [ Paweł Nosko ](https://profiles.wordpress.org/giraffex/)
 *   [ Design Cart ](https://profiles.wordpress.org/designcart/)

[Translate “Design Cart SMTP” into your language.](https://translate.wordpress.org/projects/wp-plugins/design-cart-smtp)

### Interested in development?

[Browse the code](https://plugins.trac.wordpress.org/browser/design-cart-smtp/),
check out the [SVN repository](https://plugins.svn.wordpress.org/design-cart-smtp/),
or subscribe to the [development log](https://plugins.trac.wordpress.org/log/design-cart-smtp/)
by [RSS](https://plugins.trac.wordpress.org/log/design-cart-smtp/?limit=100&mode=stop_on_copy&format=rss).

## Changelog

#### 1.0.0

 * Initial release.

## Meta

 *  Version **1.0.0**
 *  Last updated **14 hours ago**
 *  Active installations **Fewer than 10**
 *  WordPress version ** 6.2 or higher **
 *  Tested up to **7.0.4**
 *  PHP version ** 7.4 or higher **
 * Tags
 * [email](https://wordpress.org/plugins/tags/email/)[log](https://wordpress.org/plugins/tags/log/)
   [mail](https://wordpress.org/plugins/tags/mail/)[smtp](https://wordpress.org/plugins/tags/smtp/)
   [woocommerce](https://wordpress.org/plugins/tags/woocommerce/)
 *  [Advanced View](https://wordpress.org/plugins/design-cart-smtp/advanced/)

## Ratings

No reviews have been submitted yet.

[Your review](https://wordpress.org/support/plugin/design-cart-smtp/reviews/#new-post)

[See all reviews](https://wordpress.org/support/plugin/design-cart-smtp/reviews/)

## Contributors

 *   [ Paweł Nosko ](https://profiles.wordpress.org/giraffex/)
 *   [ Design Cart ](https://profiles.wordpress.org/designcart/)

## Support

Got something to say? Need help?

 [View support forum](https://wordpress.org/support/plugin/design-cart-smtp/)