I have been using an application I wrote in CodeIgniter that sends email notifications when an advertising link is activated or when it has expired. Several weeks ago, it suddenly stopped working. It was no longer sending email notifications as intended. I was using GMail’s SMTP server to send out the email notifications. GMail’s SMTP does require authentication. Typically, the CodeIgniter’s email preferences are located in the “config/email.php” file. It dawned on me that changing my GMail password broke my script. Here’s my email preferences found in the config/email.php file.
So, updating the password fixed my problem.