Multiple Emails Wrongly Being Sent to Recipients
I am using Universal Email - WA_Email.php version 1.19
PROBLEM: When sending to a large recordset of 6,299 recipients, many times multiple email are being sent to the same email recipient sometimes 2-3 times.
The recordset only contains unique email addresses so there are no duplicates, yet 2-3 emails are sent. The time difference between the first send and the third send is about 20 minutes.
I am using SendGrid to send the emails.
Any idea what could be causing this?