Email deliverability: SPF, DKIM, DMARC

Email deliverability requires SPF, DKIM, and DMARC DNS records.

What they are

• SPF — Says "these servers are allowed to send email for my domain"
• DKIM — Signs each email cryptographically to prove it came from your domain
• DMARC — Tells receivers what to do if SPF or DKIM fail

Why they matter

Without them, your emails are likely to land in spam. With them, you're treated as a legitimate sender and inbox placement is reliable.

Setting them up

• Sign up at Resend (or use Shelfwise's shared sender)
• In Resend, add your domain
• Resend gives you DNS records to add at your domain registrar:
• SPF (TXT record)
• DKIM (CNAME or TXT)
• DMARC (TXT)
• Add the records
• Verify in Resend
• Update Settings → Email → From Address to use your domain

Cloudflare or other DNS providers

Each provider has its own way of adding TXT/CNAME records. Search "{provider} add TXT record" for specific instructions.

Testing

Send a test email from Settings → Email Templates → Test. Check that it doesn't land in spam.

Issues

• Email lands in spam: usually a DMARC issue. Check DMARC policy and align.
• Email never arrives: check spam, check sender reputation
• Bounces: check the email address is valid