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Email deliverability
intelligence, weekly.

Inbox benchmarks, bounce rate breakdowns, DMARC analysis, and sender reputation guides — curated for email marketers who care about what actually lands.

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What's inside

Everything that affects your inbox rate

One email a week. Dense with data. No filler, no paid placements — just the deliverability signals that actually move the needle.

Inbox Benchmarks

Industry-level inbox placement rates across Gmail, Outlook, Yahoo, and Apple Mail. Know where you stand.

Bounce Analysis

Breakdown of hard vs soft bounce patterns, MTA response codes, and what they signal about your list health.

Authentication Deep Dives

DMARC, DKIM, SPF, BIMI, ARC — plain-language explanations of what's changing and what you need to do.

Blocklist Alerts

When major blocklists update their policies or common IP ranges get listed — you'll know before your senders do.

ESP Updates

Gmail, Outlook, Yahoo inbox changes, bulk sender requirements, and ISP-level filtering shifts — all tracked.

Practical Playbooks

Step-by-step guides: warming new IPs, fixing DMARC failures, recovering from a spam trap hit, and more.


Topics covered

The full deliverability stack

From DNS records to complaint rate thresholds — we cover every layer.

DMARC DKIM SPF BIMI Inbox placement Bounce rates Spam traps IP warming List hygiene MTA-STS Gmail requirements Outlook deliverability Complaint rates Blocklists Sender reputation Email validation Feedback loops ARC sealing DANE/TLSA Cold email

Sample issue

What a typical week looks like

Concise, actionable, and written by practitioners — not marketers.

BounceZero News · Issue #1 · April 2026
Gmail tightens bulk thresholds + Yahoo DMARC enforcement update
01
Gmail's new 0.08% complaint ceiling — what it means for your list
Google has quietly moved the hard threshold for bulk senders from 0.10% to 0.08% complaint rate. We break down how to measure yours and what to cut.
02
Yahoo requires DMARC p=quarantine by June — checklist
Yahoo Mail is enforcing DMARC policy upgrades for all senders over 5K/day. Here's the exact DNS change sequence and timeline to avoid inbox loss.
03
Spamhaus DBL: 3 common patterns getting legitimate senders listed
We analyzed 200 recent DBL listings and found three link patterns responsible for 68% of them. Practical fixes included.
04
This week's inbox placement benchmark: B2B SaaS
Gmail 91.4% · Outlook 84.2% · Yahoo 88.7% · Apple 96.1% — plus the top 3 authentication failures pulling scores down.

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