I have Drupal 6.26, Organic Groups 6.x-2.3, and Messaging 6.x-2.4. I enabled Messaging PHPMailer and installed PHPMailer in the the messaging module folder as directed. When I invite a user to my group I get the following error message:
Unable to send e-mail. Please contact the site administrator if the problem persists.
And the user never gets an email.
I did test that the site is able to send emails. I can send them via CiviCRM and users get one when they create an account. I am using the SMTP Authentication Support module for most of the Drupal emails and have verified that it is sending emails. The messaging module, however, does not use this but uses its a separate installation of PHPMailer so I’m sure that something is configured wrong there.
This used to work, not sure what was changed to break this functionality. I do have a test server and this functionality is working fine there but I cannot see what is different about them. Any ideas on where the issue could be?