[scosman]

If you're sending high volume, consider AWS SES. It doesn't have the fancy tempting of Mandrill/Sendgrid/etc, but it's a fraction of the cost and the deliverability has been excellent. We migrated 98% of our emails off Mandrill when they decided to screw all their customers and saved a ton of money.

[codegeek]

Except that SES does not offer dedicated IPs. So you are at the mercy of shared IPs which can be a disaster in case one of those IPs get blocked due to someone else's spam.