SMTP2GO features: what you get on each plan
SMTP2GO has run a purpose-built relay since 2006, and the feature list reads like it: everything an application needs to hand off mail is present from the first plan, and the paid tiers add visibility, isolation and headroom rather than new ways to send. That is the opposite shape of most platforms in this directory, where the entry plan is deliberately crippled.
Two things surprise people. The first is that an SMTP relay also sends SMS, through its own API endpoints. The second is how short the free plan’s memory is: five days of reporting on a service whose whole job is telling you what happened to a message. For a printer or a WordPress install that is fine. For anything you have to debug, the Starter step is not optional.
Feature matrix
| Feature | Included | From plan | Verdict |
|---|---|---|---|
| SMTP relay | Yes | Free | Any client or device, no SDK |
| REST API (v3) | Yes | Free | Send, search, stats, templates |
| Email templates | Yes | Free | Created and edited through the API |
| Suppression management | Yes | Free | Bounces, complaints, unsubscribes |
| SMTP users and credentials | Yes | Free | Per-user tracking and rate limits |
| Sender domain authentication | Yes | Free | SPF, DKIM and return-path per domain |
| Single sender addresses | Yes | Free | When a domain cannot be verified |
| Activity and statistics search | Yes | Free | Bounces, opens, unsubscribes, spam |
| Webhooks | Yes | Free | 1 on Free, up to 10 from Starter |
| Reporting retention | Yes | Free | 5 days free, 30 days paid |
| Team members | Yes | Free | 2 free, unlimited from Starter |
| SMS sending | Yes | — | Own endpoints, plan line not published |
| Subaccounts | Yes | — | Pricing page and API docs disagree |
| Phone and live chat support | Yes | Starter | Free gets 14 days, then tickets |
| Email archiving | Partial | Starter | Paid add-on, one to five years |
| Dedicated IP | Yes | Professional | A single IP, not before this tier |
| Email testing tools | Yes | Professional | Named on Professional and above |
Where the plan line falls
Nothing in the send path is gated. The line falls on what you can see and how far you can separate one sender from another: reporting retention, webhook count, team seats, then a dedicated IP and the testing tools at Professional, $75/mo at the published monthly rate.
That makes the choice unusually easy to reason about. If mail leaves the building and nobody needs to investigate it, Free does the job within its monthly allowance of 1,000 emails. If a person will ever be asked why a message did not arrive, buy retention first. If you send for clients on your own reputation, the dedicated IP is the reason to go to Professional, and it is the only reason.
Two rows carry — rather than a plan, and for different reasons. SMS is documented as a product with its own endpoints, but no page states which plans may use it. Subaccounts are worse: the pricing table shows them on every plan including Free, while the API documentation calls them a paid-plan feature. Both are marked unresolved rather than guessed.
This review follows our email infrastructure testing methodology. We disclose affiliate relationships in our editorial independence policy.
