Adding Custom Email Headers

Hi Everyone, I am using AWS SES as a SMTP and using on several Kentico sites. Problem is when you have 10% email bounced aws blocks your account which has happend to me, trying to setup Cloudwatch to receive SES bounced notifications, that requires to add custom email headers (specific to SES).I found that I can add headers to email mesage using msg.Headers.Add function but not sure how to add in email template.If anyone could guide where to add custom email headers in email template or settings or body I'd appreciate that.Thanks, Kashif