When SMTP relay is the right integration path
Some products still rely on SMTP because the framework, plugin, or hosted system does not support custom REST API calls cleanly. That is common in WordPress plugins, ERP tools, older CRMs, and hosted commerce stacks.
MailsSetu supports those teams with SMTP credentials that route mail into the same platform used by the API. That keeps operations consistent even while the integration method differs.
What modern teams still need from SMTP
SMTP compatibility alone is not enough. Operators still need message logs, retry visibility, verified sender domains, suppression behavior, and a clear understanding of which messages were accepted and which failed.
- Per-account SMTP credentials
- Default stream behavior for predictable routing
- Webhook and log visibility after SMTP handoff
- Domain verification and authentication guidance
Frequently asked questions
Is MailsSetu only an API service?
No. MailsSetu supports both REST API sending and SMTP relay so teams can match the integration path to their stack.
Who needs SMTP relay?
Teams using WordPress, older frameworks, vendor tools, or systems that only support SMTP often use relay service instead of direct API calls.
Does SMTP relay still support delivery logs?
Yes. MailsSetu preserves delivery and operational visibility after SMTP ingestion.
Implementation references
Once the category fit is clear, most teams move through the same path: quickstart, domain authentication, implementation docs, and then deliverability monitoring.
Create a sandbox send flow and validate your first request path.
Set up DKIM, SPF, and DMARC for production sending.
Review endpoints, payload shapes, and response semantics.
Learn how authentication and suppression behavior affect inbox placement.