Avoid Gmail’s Spam Folder

Google enforces strict sender requirements for all emails arriving at personal @gmail.com and Google Workspace inboxes.

2024+ Mandatory Sender Requirements

To avoid being rejected or diverted to Spam, your sending configuration must comply with Google’s rules:

Set Up SPF and DKIM: Both SPF and DKIM must be authenticated. Mailofly handles DKIM key generation automatically when you add your domain.
Publish a DMARC Record: You must have a valid DMARC record published at your root domain (v=DMARC1; p=none; ...).
Keep Spam Rate Under 0.10% (Absolute Cap: 0.30%): Monitor Google Postmaster Tools. A spam complaint rate above 0.3% will result in domain-wide spam folder placement or hard rejections.
One-Click Unsubscribe (RFC 8058): Marketing emails must include both List-Unsubscribe and List-Unsubscribe-Post headers allowing one-click opt-out.
Valid Forward and Reverse DNS (PTR): Mailofly maintains valid forward and reverse DNS records on all sending IP addresses.

Google Postmaster Tools

We recommend registering your domain with Google Postmaster Tools (postmaster.google.com) to monitor:

Domain reputation rating (High, Medium, Low, Bad)
Daily user-reported spam rate
SPF, DKIM, and DMARC success rates
Delivery errors

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