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This guide applies to:

  • Basic Edition
  • Plus Edition
  • Pro Edition
  • Business Edition


There could be a couple of reasons you SSA emails aren’t showing up in your Inbox. To fix email delivery issues, we’ll need to check:

  • Is WordPress sending the emails?
  • Are they in Spam or never delivered?
  • Are they sending late?
  • Is there any errors in your Message?

Is WordPress Sending the Emails?

Track emails sent using a free plugin. We recommend using WP Mail Logging by MailPoet: 

Once you’ve installed and activated your plugin, it’ll start logging your sent emails. 

To find the log, you need to go under Tools > WP Mail Log

Go back to your calendar and book a test appointment. You could set the email to send to yourself. Now go back to the WP Mail Log tool.

Now check to see whether all the Notification Emails you’re expecting show up.

Are the Emails Going to your Spam Folder or Not Being Delivered At All?

Sometimes WordPress has trouble delivering emails because it doesn’t authenticate emails.

Popular email clients like Gmail, Yahoo, and Office 365 are in constant battle against spammers. So, they check whether an email sends from the location it claims to be from.

Emails that can’t get authenticated end up in the Spam folder or not delivered at all. 

To fix this, use an SMTP service called a Mailer to send and authenticate your emails.

We recommend the free plugin WP Mail SMTP by WPForms, found here: 

Start by installing and activating WP Mail SMTP in your Plugins page. Once activated, you should be able to find the plugin page under “WP Mail SMTP”, like in the image below. 

WP Mail SMTP found witting the WordPress Dashboard

Now we have to setup an account with a Mailer to finish setting up WP Mail SMTP. There are a lot of options for Mailers, there’ll be links down below to the most recommended ones and how to set them up. 

Make sure to check the pricing on each one of the Mailers and find one that works for you, most have free trials or have a free basic plan that’ll suit most websites and businesses. 

At the time of writing this, SendGrid was the best free option offering up to 100 emails per day. If you use SendGrid make sure to verify your domain name too.

Send yourself a test email through your Simply Schedule Appointments Calendar after setting up WP Mail SMTP. Check if the email notifications got to send in WP Mail Log.

If it successfully sent, make sure to check your Inbox and see that you’ve received the email notifications too.   

Are the Emails Not Sending Out on Time?

This might be an issue with WP-Cron, the system that makes sure to send out emails on time.

Please follow the guide here on how to deal with WP-Cron: How to Make Sure Emails are Sent Out on Time

Is Your Admin Email Host Google or GSuite?

There’s a kink in the way that Google and GSuite sort their emails. If you’re using a Google-hosted email and you’re not getting your test emails, it may be because of the kink.

When sends an email to, the message sorts into the “All Mail” folder and not your “Inbox” folder. 

Google built it this way because some people BCC themselves on messages and don’t want to see those in their Inbox. 

Double-check your “All Mail” folder and see if that’s the case. 

The All Mail folder is found under the More tab expander

When you open your Google Email page, you’re usually seeing your Inbox folder. The All Mail folder is often found further down the list of folders (You may have to expand the list to find this folder). 

Are There Any Errors in Your Subject or Message?

Sometimes if your SSA Subject and Message have an error within them, it could cause delivery issues too.

Try following the steps in our Message Error guide to determine if this is caused by a syntax error and how to fix it.


This guide goes over the most common issues when it comes to email delivery issues.  

While there are a lot of reasons emails don’t get delivered, we can only help if they’re not sending. Once your site sends the email out, there’s nothing we can do to help it deliver properly.

But, hopefully our guide can give you a clue as to what’s causing the email delivery issues.

Contact our support email if you find you’re still having issues with emails not sending out.

Still stuck?

File a support ticket with our five-star support team to get more help.

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