DW Q&A Emails Notification Issue when using Amazon SES SMTP

Hello DW support team.
Nice plugin indeed and I am using it on my site as a support forum.
Currently it works great including email notifications but when I use Amazon SES SMTP, the emails do not work.
When using Amazon SES SMTP, regular wordpress emails are working fine but only DW Q & A email notifications not working.
is there any specific settings (server or port) that I should use in SMTP settings?
Any help would be highly appreciated.
thanks