[baudehlo]

A bit of shameless self promotion: Haraka is a great mail server for coding up systems for processing incoming email, including parsing out attachments. We use it at Hubdoc for streaming attachments directly from email to S3.

http://haraka.github.com/

[jonpaul]

Funny, I was just looking at Haraka earlier today to build an email-first startup. Being an active Node.js dev, Haraka looks very attractive!