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Why e-mails from your domain land in spam, and how to fix it. We explain SPF, DKIM, DMARC and MX records in plain words, with example DNS entries. Articles show common mistakes such as too many SPF lookups, missing DKIM selectors or a DMARC policy that is never enforced. Each guide ends with the exact records to add or change. We also cover how to protect your domain from people sending e-mail in your name. Good e-mail authentication makes invoices, offers and password resets reach the inbox.
6 sept 2026 · 7 min de lecturaSpam Traps Explained: What They Are and How to Avoid Them
Spam traps are addresses that catch senders with poor list practices. Learn the main types, how they end up on lists, and how to…
5 sept 2026 · 8 min de lecturaDouble Opt-In vs Single Opt-In: Which Is Better for Your List?
Double opt-in confirms every subscriber by e-mail; single opt-in adds them at once. Compare list quality, deliverability, growth and compliance to choose well.
3 sept 2026 · 7 min de lecturaHow to Reduce Spam Complaints and Keep Your Spam Rate Low
Spam complaints hurt your sender reputation more than almost anything else. Learn why people press Report spam and the practical steps that keep the…
2 sept 2026 · 8 min de lecturaShould You Send Marketing Email from a Subdomain? Pros and Cons
Sending newsletters from a subdomain can protect your main domain's reputation. Learn when it helps, when it does not, and how to authenticate it…
1 sept 2026 · 7 min de lecturaEmail Deliverability Checklist: 20 Checks for Small Businesses
A practical 20-point e-mail deliverability checklist for small businesses: DNS records, sending systems, list habits and monitoring, in the right order.
31 ago 2026 · 7 min de lecturaOrder Confirmation Emails Not Arriving? Fix Your Shop’s Mail
Online shop order and shipping e-mails missing or in spam? Learn why transactional mail fails, how to authenticate it and how to separate it…
30 ago 2026 · 7 min de lecturaShared vs Dedicated IP for Email: Which One Do You Need?
Should your business send e-mail from a shared or a dedicated IP address? Compare reputation, volume needs, warm-up and cost to choose the right…
29 ago 2026 · 8 min de lecturaSwitching Email Providers: A Checklist to Avoid Lost Mail
Moving business e-mail to a new provider? Follow this checklist for MX, SPF, DKIM, DMARC, TTLs and mailbox migration so no messages are lost…
28 ago 2026 · 8 min de lecturaHow to Read Email Headers to Check SPF, DKIM and DMARC
E-mail headers show exactly why a message passed or failed authentication. Learn how to open them in Gmail and Outlook and read Authentication-Results.
27 ago 2026 · 8 min de lecturaEmail Forwarding and Authentication: SPF, SRS and ARC Explained
Forwarded e-mail often fails SPF and sometimes DMARC. Learn why forwarding breaks authentication and how DKIM, SRS and ARC keep forwarded mail deliverable.
26 ago 2026 · 7 min de lecturaOne-Click Unsubscribe: How List-Unsubscribe Headers Work
Gmail and Yahoo expect one-click unsubscribe in marketing mail. Learn how List-Unsubscribe and List-Unsubscribe-Post work and how to test your setup.
25 ago 2026 · 7 min de lecturaEmail Bounce Codes Explained: Hard vs Soft Bounces and Fixes
Learn to read e-mail bounce messages: the difference between hard and soft bounces, what common SMTP codes mean and how to fix the causes…