Category
Setting up and debugging sender authentication records, DNS and TLS for developers.
316 posts
Use CLI tools to validate MX records and SPF configurations for better email deliverability. Detect issues before they hurt inbox placement.
Set up SPF records for 163.com domains to improve email verification accuracy and inbox placement.
Verify your email authentication setup using nslookup -type=txt and dig TXT _dmarc. Catch misconfigurations before they hurt deliverability.
Learn what each DMARC record syntax tag means, from p= to rua. Avoid delivery failures and improve sender reputation with precise DMARC configuration.
Learn how the DMARC sp=tag subdomain policy affects deliverability and sender reputation. Understand sp=reject, inheritance, and how to verify email.
Learn how to delegate a subdomain DNS to your ESP for email authentication. Prevent bounces, improve deliverability, and avoid inbox placement issues with.
Ensure your emails reach inboxes with proper DMARC alignment. Learn how SendGrid, Amazon SES, and Google Workspace handle DMARC for third-party senders.
Understand how DMARC relaxed vs strict alignment impacts email deliverability. Learn when to use each, why SPF alignment fails can block mail, and how to.
Fix email deliverability delays by understanding DNS TTL propagation for SPF and DKIM changes.
Use separate DKIM-signed domains for transactional and marketing emails to improve deliverability and sender reputation.
Learn what DMARC forensic reports RUF mean, why they're rare, and how to use them to improve email deliverability and security.
Understand what DKIM fail, DKIM none, and DKIM pass mean. Learn how to fix DKIM issues and improve email deliverability with real-world validation.
