Google Postmaster Tools best practices for marketing agencies

Agencies send on behalf of many client domains and must isolate reputation per client.

What Google Postmaster Tools are#

Google Postmaster Tools is a free dashboard showing how Gmail sees your domain: spam rate, domain and IP reputation, authentication pass rates, encryption, and delivery errors, for senders with meaningful volume.

Why it matters#

It is the only direct view into Gmail's opinion of your mail, and Gmail is usually the largest share of any consumer list.

Implementation plan for marketing agencies#

1. Add your sending domain and verify with a TXT record.
2. Send consistently for a few days so data appears.
3. Check spam rate daily; stay under 0.1% and never above 0.3%.
4. Investigate any day domain reputation drops from High.
5. Correlate authentication failures with new sending sources.

Priorities specific to marketing agencies#

Agencies send on behalf of many client domains and must isolate reputation per client. Weight your effort toward the steps above that address this constraint first, and measure with metrics that match how marketing agencies generate value from email.

Common mistakes#

• Verifying the root domain but sending from an unverified subdomain.
• Reading reputation as a single day rather than a trend.

Frequently asked questions#