Hi,
We are using OST 1.6ST for our support system (and I'm forbidden to update it because of modifications that were made by our previous devs) and we just put it on a new server where the PHP is in version 5.6
And so we get the error "authentication failure [SMTP: STARTTLS failed (code: 220, response: 2.0.0 Ready to start TLS)]" when we try to connect to our mandrill SMTP server.
I've seen other posts with the same problem, and the solutions proposed don't work for us: changing the PHP version in SMTP.php doesn't work (the error disappears yes, but the password doesn't get saved and there is no connexion to the SMTP server) and the "socket_options" solution is not possible because the SMTP.php is not of the right version.
The only solution I see would be to rollback to php 5.5, save that, anyone has an idea?