StruisICT SMTP Test Tool

Explore this developer service’s ongoing no-cost allowance, restrictions and official documentation before deploying.

INCLUDED FREE ALLOWANCEFree local CLI and GUI binaries for SMTP, IMAP and POP3 connectivity diagnostics, TLS/authentication testing, email DNS checks (MX/SPF/DMARC/DKIM), and optional Microsoft 365 OAuth; no software subscription, vendor-imposed usage quota or expiration.

View official documentation

Plan details

What do these plan and deployment labels mean?

Plan: Ongoing free allowance
Deployment model: Local / embedded
Credit card: Not required
Commercial use: Allowed
Added to directory (UTC): 2026-11-05
Last checked: 2026-11-05

Important restrictions

Local diagnostic tool, not a hosted SMTP relay or free mailbox. Requires access to existing mail servers and valid credentials; external mail-provider charges and rate limits still apply. Optional DNS and OAuth features depend on network access and Microsoft 365 permissions; some test actions interact with real mail systems.

View official documentation

Independent community listing, not affiliated with the provider. Always check the latest billing policy and quotas before enabling paid usage.