looking over this event
https://playbook.automotivesalescoach.com/wp-admin/post.php?post=8095&action=edit
it says it tried to send the reminders
I did a test within your smtp plugin and got the following errors
The test email might have sent, but its deliverability should be improved.
Domain Check Results
SPF
Action Needed: It doesn’t look like the SPF record required by Sendinblue has been added to your domain. Please check out our step-by-step guide for details on how to add this record to your domain’s DNS.
DKIM
Action Needed: It doesn’t look like the DKIM record required by Sendinblue has been added to your domain. Please check out our step-by-step guide for details on how to add this record to your domain’s DNS.
DMARC
Success! The DMARC protocol for automotivesalescoach.com is set up and working correctly.
so I’d recommend getting that sorted. but I have no experience with sendingblue I am sorry.
these reminders are sent via wordpress cron which requires people to be on the website to trigger the cron running
I am thinking its a smtp issue combined possibly with wp-cron jobs not triggering at the right time and saving the send or reapting the entire trigger
so it tries to send but fails to send to all and then tries again and fails so you get the email over and over again but the entire send is interupted
I’ll also check with Ashan to see if you can get normal cron to run with reminders as that is far more relaible
