[dav-id]

I am using Mandrill at the moment and am very happy with them, not do any large volume sends yet but I am using their inbound API which is great. I have dealt with support twice and they have been very responsive and helpful.

http://mandrillapp.com

[vijayr]

Isn't it for transactional emails? If you had to send say 300k emails a month, it is going to cost more than 200$.

Looks like the big advantage of mandrill over mailchimp is that the number of subscribers is unlimited.