How can we help?

Sendcorex is an email infrastructure platform offering SMTP relay, REST Email API, and Marketing Campaigns. It helps businesses send transactional and marketing emails with built-in deliverability tools — warm-up, dedicated IPs, webhooks, and real-time analytics.

3,000 emails per month, forever free. You get full access to SMTP, the Email API, shared IPs, and real-time analytics on the free tier. Upgrade any time as your volume grows.

Three core products: SMTP Relay for drop-in email sending with any library, Email API (REST) for programmatic sends from any language, and Marketing Campaigns with a drag & drop editor, 1,800+ templates, segmentation, and analytics.

Visit the Pricing page at any time and choose a plan. Upgrades take effect immediately. You can also downgrade or cancel from the billing settings in your dashboard.

Email us at hi.core@sendcorex.com, use the live chat in the dashboard, or reach out via WhatsApp. For urgent issues, chat is the fastest path.

Yes. Add and verify your domain in Settings → Domains. You'll add DNS records (SPF, DKIM, DMARC) and Sendcorex will verify them. Unlimited domains are included on every plan.

Warm-up gradually increases your sending volume over 14 days, building a positive reputation with Gmail, Outlook, and others. Sendcorex handles warm-up automatically — no configuration needed.

Every account gets 2 shared IPs — one for transactional email, one for marketing. This keeps your transactional reputation clean regardless of campaign volume. Additional IPs are available on paid plans.

Our fallback system detects the failure and reroutes through a backup path in under 2 seconds. Your recipients never see a failed delivery and you get notified via webhook.

Official SDKs for Node.js, PHP, Python, Java, C#, Ruby, and Go. You can also call the REST API directly from any language, or connect via SMTP using any library that supports it — Nodemailer, PHPMailer, smtplib, MailKit, JavaMail, and more.

Port 587 with STARTTLS (recommended) and port 465 with SSL. Both work on all plans including free. Your API key is used as both the username and password.

Register a HTTPS endpoint in the dashboard and Sendcorex will POST a JSON payload for every event — opens, clicks, bounces, complaints, and unsubscribes — in real time. Webhooks are available on all plans.

Our team provides free migration assistance. We'll help move your templates and contacts, configure your DNS records, and warm up your IPs — with zero downtime.

The dashboard shows real-time analytics for every send: open rate, click rate, bounce rate, unsubscribes, and conversions. For campaigns, you also get click maps and A/B test results.