Yahoo Email Deliverability Performance Feeds

Yahoo offers data feeds that report email placement and engagement derived straight from the Yahoo mail servers, rather than from tracking pixels or seed/panel data. Yahoo positions this as more privacy-conscious than pixel tracking and more representative than panel sources with limited sample sizes, given Yahoo's hundreds of millions of active users.

For a sender, this is ground-truth placement data at a major mailbox provider — the only direct way to see inbox-vs-spam folder placement at Yahoo without seed lists.

The two feeds

Placement Feed

Tracks where messages land (inbox, spam, folders) plus errors and complaints. Data is filtered using an allowlist of sender domains or sender IP addresses supplied by the consumer.

Dimensions	Metrics
dkim_domain, sender_domain, ip_address, xheader, xheader_value	inbox_delivers, spam_delivers, folder_delivers, error_delivers, complaints

The xheader/xheader_value dimensions let a sender break results down by a custom X-header (e.g. a campaign ID stamped on outgoing mail).

Campaign Performance Feed

Measures post-delivery engagement, broken down by sender domain and campaign. Filtered by a sender allowlist of sender domains.

Dimensions	Metrics
declared_template_namespace, declared_template_id, declared_template_goal, delivery_type, client, sender_domain, sender_email, engagement_date, user_local_hour, is_scrubbed	delivered, opened, link_clicked, deleted, marked_read, forwarded, starred, archived, moved, push_notif_opened, replied, marked_spam, dwell_time_read, dwell_time_glance, dwell_time_skim

Note the depth of the engagement signals — including deletes, reply, spam votes, push-notification opens, and dwell-time buckets (read/glance/skim). These are the same kinds of signals mailbox providers use internally for reputation (see Foundations of Email Deliverability).

Feed specifications

Spec	Placement Feed	Campaign Performance Feed
Reporting granularity	Hourly	Hourly
Delivery granularity	Hourly	Daily
SLA (data latency)	12 hours	48 hours
Retention	30 days	30 days
File format	Avro	Avro
Timezone	UTC	UTC
Filtering	Allowlist of sender domains or sender IPs	Allowlist of sender domains

Access

No public pricing, formal eligibility criteria, or self-serve enrollment is published. Contact mail-questions@yahooinc.com to learn about the program and access requirements.

How it fits a deliverability workflow

• Placement monitoring: replace or validate seed-list testing at Yahoo with actual per-domain/per-IP inbox vs. spam counts; watch error_delivers alongside SMTP logs (see Yahoo SMTP Error Codes).
• Complaint-rate tracking: complaints over inbox_delivers approximates the rate Yahoo enforces against the 0.3% threshold (Yahoo Sender Requirements); pair with per-recipient suppression from the Complaint Feedback Loop.
• Engagement optimization: dwell-time and action metrics (deletes vs. reads, user_local_hour) inform content, segmentation, and send-time decisions per campaign/template.
• Stream comparison: dimensions by dkim_domain/ip_address show how separated mail streams perform relative to each other (see Advanced IP Segmentation).

Related articles

• Yahoo Sender Requirements
• Yahoo Complaint Feedback Loop
• Yahoo SMTP Error Codes