How does Gmail's compliance status dashboard aggregate spam rate data for root domains and subdomains?

Gmail's compliance status dashboard primarily aggregates spam rate data at the root domain level, although Google Postmaster Tools (GPT) might offer more granular views, potentially including subdomain-level information. Strategically using subdomains is crucial for isolating reputation issues, segmenting email types (transactional vs. marketing), and safeguarding the primary domain's reputation. While subdomains possess individual reputations, the root domain's overall reputation still influences their deliverability. Proper authentication (SPF, DKIM, DMARC) for each subdomain is essential, and continuous monitoring of deliverability metrics for both root domains and subdomains helps identify and resolve issues promptly. Using dedicated IP addresses for different subdomains provides more granular control over sending reputation, and warming up subdomains gradually enhances deliverability rates. Mailbox providers evaluate sender reputation based on various factors across both root domains and subdomains, and understanding the specific policies of each provider is important.

Gmail's compliance status dashboard aggregates spam rate data primarily at the root domain level. However, Google Postmaster Tools (GPT) may offer more granular views, including subdomain-level data, depending on the version. Using subdomains strategically can help isolate reputation issues, especially when segmenting different email types (transactional vs. marketing). Dedicated IP addresses enhance control over subdomain reputation. While subdomains possess independent reputations, the root domain's reputation still influences deliverability. Continuous monitoring of both root domains and subdomains is crucial for identifying and mitigating deliverability problems.

Experts emphasize the importance of using subdomains strategically to separate email traffic types and isolate reputation issues. Proper authentication (SPF, DKIM, DMARC) is critical for each subdomain. Monitoring the sending reputation for both the root domain and subdomains is essential for maintaining deliverability. Different providers may have varying policies regarding subdomains, necessitating an understanding of each provider's specific guidelines.

Official documentation clarifies that Gmail's Compliance status dashboard aggregates spam rate data at the root domain level, not subdomains. While subdomains can have independent reputations, a significantly damaged root domain reputation can negatively affect them. Each subdomain requires its own SPF record for authentication, and DKIM signatures can be configured independently per subdomain. DMARC policies can be applied to both root domains and subdomains, offering granular control over email authentication enforcement.