Ask HN: What would you like to learn about email for startups?

Hi HN,

I'm the Product Manager of PostageApp (www.postageapp.com), and one of the things I really want to improve is the quality and quantity of posts in our blog. Specifically, I want to answer questions you have!

I have brainstormed a good list of topics to write about in regards to email for startups, and I would love to hear more about what problems/gripes/comments you may have about emails. I have run into many questions about resource allocation for emails, integration of a third party provider, and why their messages aren't being delivered to the inboxes.

So HN, what would you like to learn about, in regards to emails for your startups?