Drop-in replacement · Zero config changes

SMTP relay that
just works.

Point your existing SMTP library at smtp.sendcorex.com and you're done. 99.9% deliverability, 2 IPs, auto warm-up — all included.

Port 587 (TLS) Port 465 (SSL) 99.9% delivered 2 IPs / account
Start Free — 3,000 emails/mo View SMTP docs

Connect in 60 seconds.

Update three fields in your existing email config. Nothing else changes.

Works with your existing library. Nodemailer, SwiftMailer, smtplib, MailKit — no changes needed.
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Built for reliability

Your emails land.
Every time.

Automatic warm-up, 2 IPs, and sub-2s fallback recovery mean your customers never see a failed send.

    Inbox delivery, not spam folder. 14-day auto warm-up + 2 dedicated IPs. Reputation built from day one.
    Start free — 3,000 emails/mo

    Three steps to your first send

    No migrations. No complex DNS setups. Just swap the host.

    Three lines. That's literally it. No credit card. No migrations. Free up to 3,000 emails/month.
    SMTP docs Get started free

    Frequently asked questions

    Still have questions? Contact support

    3,000 free emails/month. No credit card. Join thousands of developers already using Sendcorex.
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    SMTP Relay — free up to 3,000 emails/month. No credit card. Start free