Currently we are using Postmaster to send all automated email, we are very happy to see such module.
Unfortunately we got some issues with it;
All email that has been sending with the ExpressionEngine service got equal signs in the mail. We already check the NewLine and the CRLF, but all options are failing.
Mandrill gives us some error: "Mandrill Service - Error: SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed"
PHP version : 5.3.13 and running Wamp.