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WooCommerce Order Emails Not Sending? Check Action Scheduler, WP-Cron and SMTP

By Alex Carter | | 6 min read
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When WooCommerce order emails stop arriving, the store looks perfectly healthy. Orders come in. The dashboard loads. There’s no error message anywhere.

The only symptom is your inbox filling up with *”Did my order go through?”* messages, and sometimes chargebacks from customers who assumed they’d been scammed.

This guide walks through the causes in the order you should check them, from the quick settings mistakes to the silent background-queue failures that catch out even experienced developers.

First: is it one email, one customer, or everything?

Symptom to cause guide: one customer missing an email points to a typo or spam; one email type stopped points to it being disabled in settings; nothing sending since a migration points to missing SMTP; late or burst emails point to a stalled Action Scheduler or WP-Cron; admin emails arriving but not customer emails points to disabled customer emails or a plugin conflict.

The pattern tells you where to look:

  • | Symptom | Most likely cause |
  • |—|—|
  • | One customer didn’t get their email | Typo in their address, or it went to spam |
  • | One email type stopped (e.g. *Completed order*) | That email was disabled in settings |
  • | No emails at all, from the moment you migrated | Mail sending is broken (no SMTP) |
  • | Emails arrive hours late, or in bursts | Background queue (Action Scheduler / WP-Cron) is stalled |
  • | Admin emails arrive but customer emails don’t | Customer emails disabled, or a recipient/plugin issue |

Step 1: Check the email settings

Go to WooCommerce → Settings → Emails. Every email (*Processing order*, *Completed order*, *Customer invoice*, *New order* and so on) has its own enable toggle. Plugins, staging tools and well-meaning colleagues sometimes switch these off.

While you’re there, check the “From” address. If it uses a domain your mail service isn’t authorized to send for, receiving servers may reject or junk the message.

Step 2: Check that WordPress can send email at all

By default, WordPress sends mail with PHP’s `mail()` function. Many hosts restrict it, and messages sent this way often fail SPF/DKIM checks and land in spam, or are silently discarded with no error.

The fix is to send through a proper mail provider over SMTP or an API using an SMTP plugin, and to set up SPF, DKIM and DMARC records for your sending domain. Then send a test email from the SMTP plugin.

If test emails work but order emails still don’t, keep going. The problem is upstream of the mail server.

Step 3: Check the background queue (the silent killer)

Diagram of the chain behind a WooCommerce order email: a visitor or server cron triggers WP-Cron, which runs Action Scheduler, which processes order updates, which send email through SMTP to the customer's inbox. Common break points: DISABLE_WP_CRON without a server cron, blocked loopback requests, a backlog of past-due actions, and PHP mail without SMTP.

WooCommerce relies on Action Scheduler, a background job queue, for a lot of order-related work, and some payment gateways hand parts of their payment confirmation to it. Action Scheduler is triggered by WP-Cron. And WP-Cron, by default, only runs when someone visits your site.

When this chain breaks, work queues up and doesn’t run. Order status changes that depend on queued work don’t happen, so the emails tied to those status changes don’t send either. There is no error and nothing on screen changes.

How to check

Go to WooCommerce → Status → Scheduled Actions and open the Pending tab.

  • A handful of actions scheduled in the future is normal.
  • Dozens or hundreds of actions that are past due means nothing is running the queue.
  • A large number in the Failed tab means jobs are running but crashing. Open one to see the error.

Common reasons the queue stops

  • DISABLE_WP_CRON’ is set to ‘true’ in ‘wp-config.php’, usually by a host or performance plugin, but no real server cron job was set up to replace it.
  • Loopback requests are blocked. WP-Cron works by your site making an HTTP request to itself. A firewall, basic-auth password, or DNS issue that blocks this kills the scheduler. `Tools → Site Health` reports loopback failures.
  • Low traffic. On a quiet store, if no one visits, WP-Cron doesn’t run.
  • A huge backlog. On busy stores the Action Scheduler tables can grow to hundreds of thousands of rows, and the queue can’t keep up.
  • A fatal error in one job that keeps failing and retrying.

How to fix it

1. Set up a real cron job on your server (most hosts offer this in the control panel) to run WP-Cron every few minutes, for example:
‘*/5 * * * * wget -q -O – “https://yourstore.com/wp-cron.php?doing_wp_cron” >/dev/null 2>&1’
or, with WP-CLI: ‘wp cron event run –due-now’
2. Then disable visitor-triggered cron with ‘define( ‘DISABLE_WP_CRON’, true );’ so the two don’t compete.
3. Clear the backlog by running it, not deleting it. Pending actions may include real customer emails and order updates. With WP-CLI you can run ‘wp action-scheduler run’. On very large backlogs, ask your host for help.
4. Fix loopback if Site Health reports it failing: whitelist your own server IP in the firewall, or remove basic-auth from production.
5. Investigate failed actions and fix the plugin causing them.

Step 4: Resend the emails customers missed

Once the cause is fixed, the emails that never went out won’t magically send themselves. For each affected order, open it, choose Order actions → Email invoice / order details to customer (or *Resend new order notification* for the admin copy), and update.

The hard part is working out *which* orders were affected. WooCommerce doesn’t give you an easy per-order record of whether each customer email was actually handed to your mail server.

Watching this automatically

Ordafide Order Integrity for WooCommerce() is a free plugin that watches the two things that make everything else fail at once:

  • Background job queue health: how far behind Action Scheduler is, how many jobs failed, and the most likely cause in plain language, plus the WordPress scheduler’s status.
  • Order email delivery: every WooCommerce email recorded against its order, with the result the mail server returned, and a one-click resend.

Its Customer never emailed check flags paid orders where no customer email reached your mail server, or where every attempt was rejected. A loopback test checks whether your site can call itself (it only calls your own site, and only when you press the button), and an optional weekly summary email tells you when there’s something to look at.

Resending is one of only two repairs the plugin can make, and every resend is written to an activity log. Ordafide sends no data to third parties and has no account or licence key.

If you’d rather be alerted the moment the queue stalls instead of finding out in a weekly summary, Ordafide Pro(https://www.premium-themes.co/ordafide-order-integrity-for-woocommerce/) adds Slack, SMS, email and webhook alerts, plus synthetic checkout monitoring every 15 minutes.

Quick checklist

  • Every needed email is enabled in WooCommerce → Settings → Emails
  • Mail goes through SMTP or an email API, with SPF/DKIM/DMARC set up
  • No pile of past-due actions in Scheduled Actions
  • A real server cron runs WP-Cron if `DISABLE_WP_CRON` is set
  • Site Health shows loopback requests working
  • Affected customers have had their emails resent

Frequently asked questions

Why are my WooCommerce order emails not sending?
The most common causes are disabled email settings, WordPress using PHP ‘mail()’ without SMTP, and a stalled background queue (Action Scheduler / WP-Cron) that stops order processing from completing.

What does “past-due actions” mean in WooCommerce?
Scheduled actions that should already have run but haven’t. A large number means WP-Cron or Action Scheduler isn’t being triggered, often because ‘DISABLE_WP_CRON’ is set without a server cron, or loopback requests are blocked.

Should I delete past-due scheduled actions?
Generally no. They can include real customer emails and order updates. Fix the cause and let them run.

How do I know which customers didn’t get their confirmation email?
WooCommerce doesn’t keep an easy per-order delivery record. A plugin that logs each email against its order, such as Ordafide, shows exactly which orders were never emailed and lets you resend in one click.

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