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How CraftMyFunnel implements RFC 5322 wire header synchronization, automated RFC 8058 one-click unsubscribe headers, and bounce-rate circuit breakers to protect secondary domain health.
Accurate reply detection and email threading require exact matching of the outbound email's RFC 5322 Message-ID header.
Many third-party providers (including Google Workspace and Gmail API) overwrite custom message ID headers during wire transmission. CraftMyFunnel employs a two-step post-send sync:
To comply with Google and Yahoo 2024+ sender guidelines, every marketing and cold outreach email dispatched through CraftMyFunnel includes compliant one-click unsubscribe headers:
When a recipient clicks unsubscribe in Gmail or Apple Mail, the webhook instantly marks the lead as UNSUBSCRIBED, immediately halting all active sequence runs across all workspaces.
To prevent mailbox blacklisting, CraftMyFunnel calculates continuous bounce and spam complaint metrics per connected mailbox:
Alerts workspace admin to re-verify prospect email lists.
Automatically pauses all active sends on affected mailbox.
Enforces human sending velocity with randomized intervals.