That's exactly why it interested me. At my previous company we had the same problem, we went through everyone of the big names until we found one that was the least expensive and had the least hassle. My wish was to roll our own mail server since the majority of what we did could easily be automated and would save our "marketing team" (one person) a lot of time, but there was just no time for that either.
Mailchimp was the funnest experience though, they say they have absolutely no phone support and everything is "self-service support", our marketing guy e-mailed back and forth with one of their higher-ups until they said "there are no phones in our office!" My co-worker then spent the rest of the day prowling over their Flickr account until he found some phones in the background of a shot of their company holiday party.
I figure since you're doing very simple e-mails (for good reason), you don't have to roll your own over fear of spam detection (HTML e-mails + using an IP that someone else had used maybe inappropriately before can lead to a high spam score) unless cost becomes an issue.
Mailchimp was the funnest experience though, they say they have absolutely no phone support and everything is "self-service support", our marketing guy e-mailed back and forth with one of their higher-ups until they said "there are no phones in our office!" My co-worker then spent the rest of the day prowling over their Flickr account until he found some phones in the background of a shot of their company holiday party.
I figure since you're doing very simple e-mails (for good reason), you don't have to roll your own over fear of spam detection (HTML e-mails + using an IP that someone else had used maybe inappropriately before can lead to a high spam score) unless cost becomes an issue.