Full Email Domain Setup and Delivery Troubleshooting

Scenario

A developer onboarding a new sending domain first verifies it in Resend by configuring DNS records (SPF/DKIM/DMARC), then optimizes deliverability and inbox placement through domain warming and spam testing, and finally troubleshoots any emails that still fail to reach recipients in Alibaba Mail.

How the products combine

1. resend · resend-verify-domain — Resend — Verify a sending domain for email authentication

See resend/resend-verify-domain.

2. resend · resend-optimize-deliverability — Resend — Improve email deliverability and inbox placement

See resend/resend-optimize-deliverability.

3. alimail · alimail-troubleshoot-received — Alibaba Mail — Troubleshoot why an email was not received

See alimail/alimail-troubleshoot-received.

Typical questions

• verify domain and fix email delivery
• set up sending domain and improve inbox placement
• domain verification failing and emails going to spam
• configure DNS records then emails not received
• new domain email setup troubleshooting
• Resend domain setup then 550 error
• verify domain SPF DKIM then missing email
• full email pipeline setup and debug

Q: How do I set up, verify, and troubleshoot a new sending domain for email delivery? A: You handle this process by using Resend to authenticate your domain and optimize inbox placement, followed by Alibaba Mail to diagnose undelivered messages. Start by configuring SPF, DKIM, and DMARC DNS records in Resend, then run domain warming and spam tests before troubleshooting any remaining delivery failures in Alibaba Mail.