Ask HN: Do I Need an Email Platform for all the Individual emails we send?

On the other end our product relies heavily on email sent to user to let them know of candidate matches we've found for them and all the follow-ups we take care. Add to that all the typical 'fetch-back' emails like 'friend you know just registered', etc.

Currently these email are sent through the server mail client, nothing special. I am just wondering if we could do better to avoid the Spam folders. Typical email platforms (like mailChimp) are built to manage list so really not our use case as email are usually sent one by one based on events that happened in the last minutes. No need for list or managing subscribers (we include links to their settings page.)

Any advice ?