We have a new Drupal 8 site and are having issues with the SMTP module. The account we are using to send email works successfully on our Drupal 7 sites and in other cases, but we cannot get it to work successfully on Drupal 8. I have also tried another Non-SSL account and am getting the same two messages over and over in the error log.
Error sending e-mail from email@example.com to firstname.lastname@example.org: SMTP Error: Could not connect to SMTP host.
Error sending email (from email@example.com to firstname.lastname@example.org with reply-to not set).
I have found many similar questions, but not a working solution yet. Any help would be greatly appreciated, thank you in advance!