---
title: "How to Bypass Cloud SMTP Restrictions Using Brevo and HTTP APIs"
url: https://daily.dev/posts/how-to-bypass-cloud-smtp-restrictions-using-brevo-and-http-apis-jx35mcxqa
source_url: https://www.freecodecamp.org/news/how-to-bypass-cloud-smtp-restrictions-using-brevo-and-http-apis
type: article
source: "freeCodeCamp"
published: 2026-05-08T21:09:46.109Z
updated: 2026-05-08T21:10:12.368Z
tags: ["nodejs", "rest-api", "express"]
reading_time: 9
upvotes: 1
comments: 0
language: en
---

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# How to Bypass Cloud SMTP Restrictions Using Brevo and HTTP APIs

**[freeCodeCamp](https://daily.dev/sources/freecodecamp)** · 9 min read · 1 upvotes · 0 comments

## Summary

Cloud platforms like Render and Heroku block outbound SMTP ports (25, 465, 587) to prevent spam, causing email-sending code that works locally to fail in production. The solution is to use Brevo's HTTP REST API instead of Nodemailer/SMTP, since HTTPS traffic on port 443 is never blocked. A step-by-step Node.js/Express implementation shows how to set up Brevo's free tier (300 emails/day, no custom domain required), configure API keys, build a reusable sendEmail utility using native fetch(), and integrate it into a signup route that sends OTP verification emails.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.freecodecamp.org/news/how-to-bypass-cloud-smtp-restrictions-using-brevo-and-http-apis>

---

Tags: [#nodejs](https://daily.dev/tags/nodejs), [#rest-api](https://daily.dev/tags/rest-api), [#express](https://daily.dev/tags/express)

[View this post on daily.dev](https://daily.dev/posts/how-to-bypass-cloud-smtp-restrictions-using-brevo-and-http-apis-jx35mcxqa)