Fast and reliable
SMTP service.
Point your existing application, mailer, or CRM at Reloop's lightning-fast SMTP relay. Zero code changes.
Connect easily with any service.
No extra setup — plug Reloop into the mailer or platform you already use.
Send your first email
Use the connection settings above with your API key as the password. Pick a language—the snippet updates, the guide stays the same.
- Port 587 with STARTTLS (or 2465 / 2587)
- Same host, user, and key for every mailer
- API key from the dashboard as password
1import nodemailer from 'nodemailer';2
3const transporter = nodemailer.createTransport({4 host: 'smtp.reloop.sh',5 port: 587,6 secure: false, // use STARTTLS7 auth: {8 user: 'reloop',9 pass: process.env.RELOOP_API_KEY,10 },11});12
13await transporter.sendMail({14 from: 'noreply@yourdomain.com',15 to: 'user@example.com',16 subject: 'Hello from Reloop',17 html: '<p>Sent via SMTP relay.</p>',18});Built for every mailer
Reloop SMTP relay works with the tools you already run—no SDK swap, no proprietary API lock-in.
No SDK required
Point Nodemailer, PHPMailer, Django, Rails, or any SMTP client at Reloop. Same host, port, and credentials everywhere.
STARTTLS & TLS ports
Port 587 with STARTTLS for most apps, plus 2465 and 2587 for direct TLS. Pick what your mailer supports.
Analytics included
Every SMTP send counts toward the same quota and shows up in Reloop analytics—opens, clicks, bounces, and delivery status.
Same stack as the API
SMTP relay shares Reloop's delivery infrastructure with the REST API—webhooks, templates, domains, and deliverability tools all apply to SMTP sends.
- Transactional & campaign email
- Custom domains & DKIM signing
- Webhook events on delivery
Free to start
3,000 emails per month on the Free plan. No credit card required—upgrade when your volume grows.
3,000 emails / month
Ready to send?
Get SMTP credentials.
Sign up, create credentials in the dashboard, and point your mailer at Reloop.
Frequently asked questions.
Host smtp.reloop.sh, username reloop, and your Reloop API key as the password. Port 587 with STARTTLS works for most mailers; 2465 and 2587 are also available for direct TLS.
Yes. Each successfully sent email via SMTP relay counts toward your monthly quota—the same as transactional API sends and campaign deliveries.
If your app already sends email over SMTP, you only need to update the host, port, username, and password in your existing mailer configuration. No SDK or API migration required.
Port 587 with STARTTLS is the recommended default for most frameworks and mailers. Use port 2465 or 2587 if your client requires implicit TLS from the start.
Yes. Reloop provides setup guides for WordPress, Laravel, Nodemailer, Django, Rails, Supabase, and many other platforms. Each uses the same host and credentials.
Yes. Reloop is open source—you can run the full stack including SMTP relay on your own infrastructure, or use the hosted relay from Reloop Labs.