SMTP2GO
Reliable SMTP relay with strong deliverability.
SMTP2GO is a long-running transactional service that focuses on SMTP-relay delivery. Plans are simple, and the public pricing page lists feedback loops, blacklist monitoring, spamtrap detection, and real-time analytics.
Strong deliverability tooling for an SMTP-first service, including feedback loops, blacklist monitoring, spamtrap detection, and bounce tracking.
SMTP relay use cases where deliverability is the primary criterion.
- › Deliverability controls included
- › Simple plan structure
- › No feature gating across paid tiers
- › Less brand awareness than SendGrid or Mailgun
- › Fewer ecosystem integrations
Features at a glance
| API | Yes |
| SMTP | Yes |
| SDKs | node, python, go, ruby, php |
| Webhooks | Yes |
| Templates | basic |
| React Email | No |
| Batch send | Yes |
| Scheduled send | No |
| Suppressions | Yes |
| Multi-tenant | Yes |
| Inbound parsing | Yes |
| Event stream | Yes |
| Idempotency keys | No |
| Dedicated IP | Yes |
Appears in rankings
Best transactional email APIs
Underrated. Independent tests place it near the top of inbox placement.
Best permanent free tiers
1,000/mo permanent, no daily cap.
Cheapest at scale (1M+/mo)
Tiered plans with full-feature parity at higher tiers.
Best deliverability
Repeatedly recognized for top inbox placement.
Best for high-volume senders
Underrated at scale; full-feature parity across tiers keeps the bill predictable.
Best for multi-tenant and agency email
Predictable SMTP relay with account structures that work for consultants and managed senders.
Best AWS SES alternatives
Closest to SES on pricing predictability, with deliverability and a real dashboard.