Deliverability & DNS
SPF, DKIM, DMARC setup guides, DNS record configuration, inbox placement troubleshooting, and deliverability monitoring for self-hosted email.
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SPF Record for Email: Exact Setup for Business Domains
Your SPF record for email is either right or it isnt. Since February 2024, Google and Yahoo reject messages from domains with broken or missing SPF. Heres the exact configuration for your setup, plus the hidden traps that make correct-looking records fail silently.
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Alexey Bulygin
Email Sender Reputation: 4 Signals That Matter
Mailbox providers score your email sender reputation on four specific signals. Understand the complaint rate cliff, authentication requirements, volume thresholds, and IP hygiene rules — then fix them before your mail stops delivering.
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Alexey Bulygin
Email Domain Reputation: Why It Tanks & How to Fix It
Your email domain reputation has been degrading quietly — by the time you notice, you're already muted. Four specific causes kill it. Here's the diagnostic workflow and structured recovery protocol.
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Alexey Bulygin
Domain Reputation Email: Why Your Domain Gets Tainted
Your emails keep landing in spam, even after switching hosts and getting a fresh IP. The problem isn't your server — it's your domain name. Domain reputation email damage follows the domain. Here's how to diagnose it, prevent it, and recover.
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Alexey Bulygin
Domain Reputation: Build, Drop, and Recover | TrekMail
Your domain has a reputation score with every major inbox provider. Cross 0.3% spam complaints and you're blocked. Here's how domain reputation works, what destroys it, and the exact recovery protocol.
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Alexey Bulygin