SendPorterDeliverability Solution
Automated DKIM, SPF & DMARC Authentication
Pass Gmail, Yahoo, and Outlook 2026 authentication requirements automatically. SendPorter generates your DKIM keys, recommends exact SPF TXT records, and tracks DMARC compliance without cryptographic complex homework.
The 3 Pillars of Email Authentication
1. DKIM (DomainKeys Identified Mail): Cryptographic signature added to email headers proving the email content was not tampered with during transit.
2. SPF (Sender Policy Framework): DNS record listing authorized mail servers permitted to send email on behalf of your domain.
3. DMARC (Domain-based Message Authentication): Policy telling receiving inbox providers (Gmail, Yahoo) how to handle messages that fail DKIM or SPF checks.
Check your domain authentication for free
Use our interactive generator tool to build valid SPF, DKIM, and DMARC DNS records in seconds.
Launch DNS Generator Tool