Ardent team at KnackForge always love to get hands dirty with challenging projects. In this connection we recently took an interesting newsletter sending project from one of our potential clients who is doing relatively big in Internet marketing.
In brief, we were asked for a custom system for sending out newsletter emails, based on Drupal. Tentatively 600k emails to be sent per month. A newsletter list shall have up to 80k users and limited to a couple of lists to begin with.