Appointments+ is not sending emails

I have installed the latest version of appointments+ .
wordpress version - 3.7.1 ( network install)
I have also installed WP-Mail-SMTP plugin and set up the mails to be sent by Amazon SES service.
1. Mails related to appointments+ are not being sent . ( When a appointment is created / changed to confirmed status etc )
2. Also , there is no entry for these mails in the appointments+ log too ( The setting is yes )