How to filter newsletter based on topics?

Hi

I want to use a mailservice for my newsletters.

I have a custom post type opportunity which

can include topics (sport, film, etc).

I want to send mail once every day to my visitors

for which they are subscribed to and also if

the topics they are interested in.

Currently I am using mailchimp but in mailchimp

I can not filter based on topics or any other

variable

Can you suggest me a plugin or which can help

me for this.

Thanks