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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.
Oct 7, 2026 · 8 min readWhy Gmail Shows “via” Next to Your Sender Name and How to Fix It
Gmail adds "via" and another domain next to your name when the sending service does not sign mail for your domain. Learn why it…
Oct 4, 2026 · 8 min readDKIM 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…
Oct 1, 2026 · 7 min readDMARC 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…
Sep 30, 2026 · 8 min readFrom 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…
Sep 29, 2026 · 8 min readBackscatter: 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…
Sep 29, 2026 · 7 min readDKIM 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…
Sep 29, 2026 · 8 min readDomain 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…
Sep 28, 2026 · 8 min readEmail 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…
Sep 26, 2026 · 8 min readSPF 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.
Sep 23, 2026 · 7 min readWhat 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.
Sep 21, 2026 · 7 min readEmail 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.
Sep 19, 2026 · 7 min readDKIM 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.