I used Sendgrid based on the recommendation of the IPS staff and because support is built into IPS. Unfortunately the price of Sendgrid is 10x that of Amazon's SES simple email service.
I just switched over to Amazon SES and am stuck using the SMTP route rather than via the API because there isn't native support via IPS like there is for Sendgrid.
I'd like to ask for or vote for IPS adding support for Amazon SES, just like it supports Sendgrid.
