Email Notifications Not Always Sending

For a while now we have been getting reports from users that they have submitted contact forms on our site that we never get an email notification for. Each time I always check to make sure that the forms in question are still enabled for notifications.

We are using WP Mail SMTP to connect to our SMTP server and have that plugins Debug tracker enabled. It records each time a notification is correctly sent out but does not record anything at the times that users claim they submitted a form we never received a receipt of. Similarly, we have the pluggin WP Mail Tracking installed. It records both successful and unsuccessful emails sent out but never has an entry for the times that users claim they submitted a form we never received a receipt of.

It seems that the issue is somewhere within the scope of the Constant Contact plugin since the notifications don’t even seem to be registering with WP Mail SMTP. And yes, we have considered user error but this issue has been going on for over a year and is too frequent to be user error at this point.

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