Deliverability & DNS
SPF, DKIM, DMARC setup guides, DNS record configuration, inbox placement troubleshooting, and deliverability monitoring for self-hosted email.
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Custom Email Address: From Domain Purchase to Working Mailbox (2026)
Set up a custom email address on your own domain with the right DNS, mailbox host, authentication, and migration-safe structure.
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Alexey Bulygin
DMARC Policy: None vs Quarantine vs Reject
Your DMARC policy can quietly expose your domain or quietly break your own mail. Here’s the practical path from p=none to p=reject without causing self-inflicted outages.
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Alexey Bulygin
DMARC Alignment: Fix SPF, DKIM, and Forwarding Failures
DMARC passes only when SPF or DKIM align with your visible From domain. Here’s why legitimate mail still fails, and how to fix it without breaking forwarding.
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Alexey Bulygin
Email Deliverability Monitoring for Small Teams in 2026
Most teams notice deliverability only after invoices, onboarding emails, or campaigns vanish into spam. Here's the monitoring routine that catches problems before they cost you.
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Alexey Bulygin
How to Create DKIM Record — Step-by-Step DNS Setup Guide
Step-by-step guide to create a DKIM record: generate your key pair, publish the public key in DNS, enable signing, and verify. Covers syntax, common mistakes, and key rotation.
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Alexey Bulygin
DMARC Fail: Fix Forwarding and Alignment Problems
DMARC fail on forwarded mail isn’t random. SPF breaks, DKIM gets mangled, alignment goes off the rails, and real messages vanish. Here’s how to diagnose it and fix it.
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Alexey Bulygin
Email Deliverability: The Operator's Guide for 2026
Email deliverability is no longer set-and-forget. This operator's guide covers the failure modes, DNS traps, reputation signals, and triage steps that keep business mail out of spam.
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Alexey Bulygin
DMARC Setup: Publish, Test, and Enforce Correctly
DMARC setup is simple until SPF, DKIM, forwarding, and third-party senders collide. This guide shows the record to publish, the tags that matter, and how to enforce safely.
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Alexey Bulygin
DMARC Analyzer: Read Reports and Fix Failures Fast
Most DMARC failures are not what they look like. This guide shows how to use a DMARC analyzer to separate spoofing, forwarding, and real DNS mistakes.
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Alexey Bulygin
Email Authentication SPF DKIM DMARC Setup Order
SPF first. DKIM second. DMARC last. This guide shows the safest way to set up email authentication without breaking legitimate mail flow.
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Alexey Bulygin
DMARC Record Example: 5 Policies That Actually Work
A practical DMARC record example guide with working TXT records, rollout steps, common failure points, and the TrekMail setup choices that affect alignment.
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Alexey Bulygin
Create DMARC Record: DNS Setup, Policy, and Mistakes
Create DMARC record the right way: exact DNS host, sample TXT values, policy rollout, alignment traps, and the mistakes that quietly break mail.
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Alexey Bulygin