DNS and deliverability, explained.

DNS & Deliverability 28 Sep 2026

How to Check DKIM Status and Diagnose Failures

Check DKIM status with a DNS lookup or free checker, then diagnose missing selectors, wrong keys, and alignment failures that break deliverability.

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DNS & Deliverability 26 Sep 2026

Free Email Authentication Checks: SPF, DKIM, and DMARC

Check SPF, DKIM, and DMARC with free tools, then verify authentication and alignment on a real message. Understand what a DNS check can and cannot prove.

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DNS & Deliverability 22 Sep 2026

Bounce vs Complaint vs Delay: What to Do With Each DSN

A one-page operator policy for hard bounces, 4xx delays, policy blocks, and complaints. Classify RFC 3463 DSN codes, suppress 5.1.x, retry 4.x.x with a cap, and never retry a spam complaint.

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DNS & Deliverability 15 Sep 2026

What Is an MX Record? MX Priority, Lookup & Common Mistakes

Learn what an MX record controls, how priority works, how to run an MX lookup, and why mail may still reach the old provider after a DNS cutover.

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DNS & Deliverability 13 Sep 2026

Warm Up a New Domain Without Guessing

Warm up a new sending domain with real transactional mail and staff replies—not fake warmup networks. A 2–4 week ramp, Gmail spam-rate limits, and stop rules.

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DNS & Deliverability 10 Sep 2026

How to Test Inbox Placement Before a Major Send (and What Seed Tests Miss)

Seed tests miss recipient history. Layer authentication, rendering QA, seeds, and Postmaster Tools spam rate before you ramp a major send.

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DNS & Deliverability 09 Sep 2026

Domain Reputation vs IP Reputation: What Still Matters for Deliverability

Domain and IP reputation remain separate deliverability signals even after Google retired the old Postmaster badges. Learn what follows you across ESPs and what to monitor in 2026.

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DNS & Deliverability 08 Sep 2026

ARC Email Authentication: Forwarding, DMARC, and Why ARC May Be Retired

Why forwarding breaks SPF and DMARC, how Authenticated Received Chain (ARC) headers work, and why the IETF is considering reclassifying ARC as Historic in 2026.

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DNS & Deliverability 07 Sep 2026

MTA-STS and TLS-RPT Setup: Enforce TLS Without Breaking Inbound Mail

Publish TLS-RPT first, serve an MTA-STS testing policy with your real MX names, then flip to enforce. ArawaMail does not write these records for you.

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DNS & Deliverability 06 Sep 2026

One-Click Unsubscribe: List-Unsubscribe Headers in Laravel and Next.js

RFC 8058 List-Unsubscribe and List-Unsubscribe-Post on ArawaMail: Laravel mailables, POST /emails headers, and why transactional mail should omit them.

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DNS & Deliverability 06 Sep 2026

Gmail and Yahoo Bulk-Sender Requirements (2026) — Before Q4 Volume

Gmail’s 5,000/day bulk-sender rule is sticky and counts every subdomain. Checklist for Gmail, Yahoo, and Outlook before Q4 2026 volume.

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DNS & Deliverability 05 Sep 2026

Email List Hygiene in 2026 Without Hurting Deliverability

Clean hard bounces, complaints, and traps the same day. Sunset marketing names after re-engagement—not invoices. ArawaMail does not clean lists; you own recipient quality.

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