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
SPF Fail: Decode the Error and Fix It Fast
Your email bounced with 550 5.7.1 or 5.7.26 and a client is waiting. An SPF fail is a DNS authentication failure, not a content problem. This guide decodes the error, finds the failing IP in your headers, and walks through the three fixes that resolve most cases.
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Alexey Bulygin
Business Email
Mail Filters, Auto-Reply, and Sieve: Server-Side Email Rules Are Here
Your inbox should sort itself. Mail filters let you automatically forward, sort, flag, or discard incoming emails based on sender, subject, or content. Auto-reply handles vacation messages. And if you need full control, the Sieve editor lets you write custom scripts.
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Alexey Bulygin
Deliverability & DNS
Improve Email Deliverability: 30-Minute Checklist
Your mail can get a 250 OK and still vanish. This 30-minute checklist shows how to improve email deliverability by fixing SPF, DKIM, DMARC, reverse DNS, and complaint rate before you waste time on the wrong thing.
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Alexey Bulygin
Email Forwarding
Catch All Email Hosting Checklist: 8 Things to Verify
Enabling catch-all email hosting switches your server from deny-by-default to accept-everything. That invites Directory Harvest Attacks, backscatter, and account suspensions. Run this 8-point checklist before you enable it.
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Alexey Bulygin
Deliverability & DNS
Email Deliverability Monitoring: The 15-Minute Routine
Your SMTP server says 250 OK. Your client never saw the email. That silence is what makes email deliverability monitoring critical — and neglected. Here's the free-tool routine that catches failures before they torch your domain.
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Alexey Bulygin
Email Forwarding
What Is a Catch All Email Address? Risks & Alternatives
A catch all email address sounds like a safety net — it catches typos before they bounce. In practice it's an open intake policy that invites spam floods, backscatter blacklisting, and broken SPF. Here's what it actually does and why you probably don't need it.
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Alexey Bulygin
Email Forwarding
Email Forwarding Custom Domain: Complete Setup Guide (2026)
Email forwarding custom domain setup routes incoming mail from your domain to an existing inbox like Gmail. This guide covers the 4-step process, 5 DNS pitfalls, SRS/ARC protocols, and a verification workflow to confirm nothing lands in spam.
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Alexey Bulygin
Email Forwarding
Domain Email Alias vs Mailbox: How to Choose the Right Setup
Domain email alias vs mailbox: aliases route mail for free but leak your identity and break audit trails. Mailboxes give isolation and clean handoffs. Here is when to use each.
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Alexey Bulygin
Email Forwarding
Forward Email to Outlook: 3 Setup Methods That Actually Work
Three ways to forward email to Outlook—MX-level forwarding, mailbox relay, and IMAP pull—with the exact error codes you'll hit and how to fix authentication failures, IP throttling, and mail loops.
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Alexey Bulygin
Email Forwarding
Catch All Mailbox vs Catch All Address: Key Differences (2026)
The catch all address is a routing rule. The catch all mailbox is where the mail lands. Confusing them leads to spam floods, broken replies, and compliance headaches. Here is how to set up both correctly.
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Alexey Bulygin
Email Forwarding
Catch All Mailbox Setup: 3 Safe Patterns That Protect Your Domain
A catch-all mailbox accepts every message sent to your domain, even when the recipient doesn't exist. This guide covers the setup patterns, spam risks, and operational decisions that determine whether catch-all helps or hurts your email infrastructure.
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Alexey Bulygin
Email Forwarding
Catch All Email: How It Works, Why It Breaks, and What to Do Instead
A catch all email setup tells your server to accept every message sent to your domain, even when no matching mailbox exists. This guide covers the SMTP mechanics, 5 production risks, authentication failures, and why explicit aliases are the better answer.
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Alexey Bulygin