You can see the delivery status of sent emails in the Reports section. To do this, go to the Reports > Email Delivery in the Client Reports section.
This report will give you the status of all emails sent from your account for the past 30 days.
If the status of the email is Sent, then the client's email service accepted the email. This means the email wasn’t returned.
The best thing to do in this case is to have your client check their spam or junk folder.
If the status of the email is Rejected, then the client's email service didn’t accept this email. This can happen for one of 2 reasons:
1) The client's email address bounces - meaning that the address is typed incorrectly and doesn't exist.
2) The client marked one of the previous emails as spam.
The first thing to check is to make sure the correct email address is entered for the client.
If the email address is definitely entered correctly, then have your client check their spam folder as well as their settings in their email. Sometimes clients accidentally will mark an email as spam which will prevent future delivery. Once they remove SimplePractice from their spam list, emails should resume.