Since I took over this project, we have had an active subscription to CiviSMTP for all of our outgoing email in CiviCRM. We already have our email for our organization going through Gmail, but all mail through the CiviCRM is going through CiviSMTP, a service that we have to pay for. From what I understand, it's to help with anti-spam regulations and bounce rate tracking, etc.
Can anyone offer some clarity into if this kind of service is necessary for sending out bulk emails and tracking bounce backs, etc? Is anyone else here even using it?
Can anyone recommend an SMTP service that does work with PHP 5.6 and CiviCRM 4.7.17 and allows TLS? Here is a related post to the issues I'm having with CiviSMTP: Outgoing Mail Settings, CiviSMTP & PHP 5.6.x Problem
Drupal 7.50 CiviCRM 4.7.15 PHP 5.6