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BNবাংলা#Email Authentication
Email authentication is the set of DNS-based standards that prove a message really comes from the domain it claims. The core trio is SPF, DKIM and DMARC, supported by related standards such as BIMI, MTA-STS and reverse DNS. Mailbox providers use authentication results as one of the first signals when they decide whether to trust a message. Without it, legitimate mail is more likely to be filtered and criminals can impersonate the domain more easily. The articles under this tag explain how the standards fit together and how to check them.
2026/10/04 · 8分で読めますDKIM Selectors Explained: How to Find Yours and Use Several
A DKIM selector tells receivers where to find your public key. Learn how to find the selector you use, run several senders and rotate…
2026/10/01 · 7分で読めますDMARC Failure Reports (ruf): What They Show and Their Limits
DMARC failure reports send details of individual messages that fail checks. Learn what ruf and fo do, why few providers send them, and privacy…
2026/09/30 · 8分で読めますFrom Name and Address: Email Sender Details That Build Trust
The From name, From address and Reply-To decide whether people trust and open your email. Learn how to choose them, avoid no-reply and keep…
2026/09/29 · 8分で読めますBackscatter: Why You Get Bounces for Emails You Never Sent
Getting bounce messages for emails you never sent? That is backscatter from spoofed spam. Learn how to tell if you were hacked and how…
2026/09/29 · 7分で読めますDKIM Key Length: 1024 vs 2048 Bits and Long DNS Records
Should your DKIM key be 1024 or 2048 bits? Learn what the standard recommends, how to publish long keys in DNS without errors and…
2026/09/29 · 8分で読めますDomain Reputation vs IP Reputation in Email: What Counts
Mailbox providers judge both your sending IP and your domain. Learn how domain and IP reputation differ, how each is built and how to…
2026/09/28 · 8分で読めますEmail Setup for a New Business Domain: Get It Right on Day One
Starting a business or a new domain? Set up MX, SPF, DKIM and DMARC, website mail and sending habits correctly from day one, before…
2026/09/26 · 8分で読めますSPF Record Examples for Common Small Business Setups
Practical SPF record examples for Google Workspace, Microsoft 365, website mail, newsletter tools, own servers and parked domains, with the pitfalls to avoid.
2026/09/23 · 7分で読めますWhat Is Email Deliverability? A Plain-English Guide for Owners
E-mail deliverability explained without jargon: what decides whether your messages reach the inbox, why it matters for any business and where to start.
2026/09/21 · 7分で読めますEmail Deliverability for Agencies: Managing Client Domains
Agencies often inherit client domains with broken e-mail setups. Learn how to audit, fix and monitor SPF, DKIM and DMARC across many client domains.
2026/09/19 · 7分で読めますDKIM Key Rotation: When and How to Replace Your Keys Safely
DKIM keys should not live forever. Learn why to rotate them, how often, and a step-by-step process that replaces keys without breaking e-mail delivery.
2026/09/17 · 7分で読めますInvoice Fraud by Email: How Small Businesses Stay Protected
Fake invoices and changed bank details by e-mail cost businesses real money. Learn how the scams work and the technical and process defences that…