> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.brevo.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.brevo.com/_mcp/server.

# Input Validations for SMTP and Transactional SMS Calls.

Input validations have been changed for routes. Now they will follow the rules in the swagger specifications.

Effected routes are

* [All SMTP routes](https://developers.sendinblue.com/reference#smtp-1)
* [Send transactional SMS](https://developers.sendinblue.com/reference#sendtransacsms)