TrekMail Blog
Practical guides, email hosting insights, and tips to get the most out of your domains and mailboxes.
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Deliverability & DNS
DKIM Fail: Causes, Fixes, and Header Checks
DKIM fail is a cryptographic break, not a warning. This guide shows the exact headers, DNS lookups, and message-path checks to fix it fast.
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Alexey Bulygin
Deliverability & DNS
DKIM Record Generator: Safe Setup Guide for 2026
Most DKIM record generator tools hide the risky part: whoever creates the private key can impersonate your domain. Here’s the safe setup path.
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Alexey Bulygin
Deliverability & DNS
Email Bounce Rate: Safe Thresholds and How to Fix It
Most bounce problems aren't just a list issue — they're an infrastructure emergency. This guide breaks down every SMTP bounce code, the thresholds that trigger ISP penalties, and the exact triage order to stop deliverability damage before it spreads.
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Alexey Bulygin
Deliverability & DNS
SPF Record Example: Copy-Paste Templates for Every Setup
Copy-paste SPF record examples for common setups: single provider, hybrid stacks, and forwarding. Covers lookup limits, flattening risks, and verification commands.
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Alexey Bulygin
Deliverability & DNS
SPF Setup for Multiple Senders: Beat the 10-Lookup Limit
SPF has a hard 10-lookup ceiling and most multi-sender domains blow past it silently. Here's the subdomain segmentation pattern that gives each sending stream its own budget — so your SPF setup survives vendor changes without rewrites.
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Alexey Bulygin
Deliverability & DNS
Email Deliverability Best Practices That Actually Work
Your server can say sent while the inbox says no. These email deliverability best practices focus on authentication, reputation, forwarding, and the operational mistakes that actually tank placement.
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Alexey Bulygin
Deliverability & DNS
Email Sender Reputation Score: What It Measures, How to Fix It
Google, Microsoft, and Yahoo each maintain separate reputation verdicts for your domain. Here's what they actually measure, where the hard limits are, and a 14-day recovery plan for when your email sender reputation score crashes.
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Alexey Bulygin
Deliverability & DNS
DMARC RUF: When to Use It and When to Skip It
DMARC RUF sounds useful until it floods your inbox or gives you nothing from the providers that matter. Here’s when to use it, when to skip it, and what to configure instead.
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Alexey Bulygin
Deliverability & DNS
Why Emails Go to Spam: Real Causes & Fixes | TrekMail
SPF passes. DKIM passes. DMARC is set. And yet you're in spam. Here's why emails go to spam even with perfect authentication — and the structural fixes that actually work.
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Alexey Bulygin
Providers Compared
Rackspace Email Alternatives: Reliability, Support & Admin UX (2026)
Rackspace email is showing its age. This guide compares the top alternatives — Microsoft 365, Google Workspace, Zoho Mail, and TrekMail — across pricing models, storage architecture, multi-domain admin, and migration tooling.
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Alexey Bulygin
Deliverability & DNS
Domain Reputation: How It Breaks and How to Fix It (2026)
Domain reputation breaks faster than it builds. This guide covers the 0.3% spam complaint cliff, SPF/DKIM/DMARC alignment traps, the Yahoo inbox-denominator death spiral, Google's high-water mark rule, and the step-by-step recovery plan to pay down reputation debt.
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Alexey Bulygin
Providers Compared
Email Management Platform: How to Choose for Business (2026)
Choosing an email management platform isn't about feature checklists — it's about cost models, storage architecture, and deliverability control. This guide compares per-seat vs flat-rate pricing, pooled vs split storage, and multi-domain management for agencies.
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Alexey Bulygin