Gmail Deliverability

Gmail is strict about identity, reputation, and recipient engagement.

Identity checks

• SPF authorizes the actual outbound IP or provider.
• DKIM signs with the sender domain.
• DMARC exists and aligns.
• PTR/rDNS matches the outbound host.
• From domain matches the brand sending the message.

Content checks

• Avoid misleading subjects.
• Keep the sender identity recognizable.
• Use clear text, not image-only content.
• Include unsubscribe links for marketing email.
• Avoid link shorteners and suspicious redirects.

Volume checks

• Warm new domains and IPs gradually.
• Send first to engaged recipients.
• Watch deferrals before increasing volume.
• Stop and investigate if bounces or complaints rise.

PING8 checks

• Open campaign analytics and inspect provider rows.
• Review failure details for gmail.com.
• Check KumoMTA runtime if using KumoMTA.
• Confirm lifecycle events are being recorded.