Mailgun vs SMTP2GO: Which is best for you?

Deliverability tooling, rich logs, and analytics clarified send status, improved by added SPF, DKIM, and DMARC support on suppression lists safeguarding reputation and getting transactional messages into inboxes on time.

Also it is a bit expensive if you are planning really large scale email delivery.

Once configured, it runs quietly and efficiently, maintaining high deliverability and reliability. While network configuration steps such as IP whitelisting can occasionally slow initial setup, these are minor compared to the overall stability and value the service provides.

I use smtp2go for multiple customers, and i'm passing on the costs, but for the customer it can initially feel a bit like range anxiety when they don't know how much their spend is going to be, especially when they are coming off a "free" service (usually provided by their ISP).