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@PaulGear I would start by not explicitly asking "What products are out there?" Instead, define the end state, what you want to accomplish, and then any constraints. And I'd personally lose the bullet list and rewrite any necessary parts of it in prose, but that's mainly style.
That's probably because you're sending directly from EC2. A few places blacklist every Amazon EC2 IP address range. I have a server on EC2, and I relay all its mail through a little VPS at some other small $PROVIDER nobody's ever heard of. It gets 99%+ delivered.
Come to think of it, at that volume you could probably use your ISP's SMTP relay for free. Presuming, of course, that this is not bulk mail but simply routine person-to-person mail.
At 30 messages per day I doubt I would even bother with a third party service. If you have an email admin who is even halfway clueful, you can manage deliverability for such a low volume yourself.
@ErikE By default it shows "no upvoted answers". Those need upvotes too! Especially when they're correct. You then click on "no answers" to get questions with zero actual answers.
