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BNবাংলা#DKIM
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to every outgoing message. The public key is published in DNS under a selector, and receiving servers use it to confirm that the message was signed by the domain and not altered on the way. Each sending service, such as a mail host or a newsletter platform, usually needs its own DKIM key. DKIM survives most forwarding, which makes it the most reliable basis for DMARC alignment. The articles under this tag explain setup, key length, rotation and signature failures.
7 oct 2026 · 8 min de lecturaWhy 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…
4 oct 2026 · 8 min de lecturaDKIM 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…
29 sept 2026 · 7 min de lecturaDKIM 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…
19 sept 2026 · 7 min de lecturaDKIM 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.
14 sept 2026 · 7 min de lecturaHow to Authenticate Third-Party Email Senders for Your Domain
CRMs, helpdesks, newsletter and invoicing tools often send as your domain without proper authentication. Learn how to find them and align each with DMARC.
11 sept 2026 · 8 min de lecturaDKIM Failing? How to Troubleshoot dkim=fail and dkim=none
A step-by-step guide to fixing DKIM failures: missing keys, wrong selectors, truncated records, modified messages and signatures that use the wrong domain.
8 sept 2026 · 8 min de lecturaDMARC Alignment Explained: Relaxed vs Strict Mode
DMARC passes only when SPF or DKIM aligns with your From domain. Learn how relaxed and strict alignment differ, and which mode suits your…
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.
15 ago 2026 · 8 min de lecturaMicrosoft 365 Email Authentication: SPF, DKIM and DMARC Setup
A practical guide to SPF, DKIM and DMARC for Microsoft 365: the records to publish, how to enable DKIM in the Defender portal and…
14 ago 2026 · 8 min de lecturaGoogle Workspace SPF, DKIM and DMARC Setup, Step by Step
Set up SPF, DKIM and DMARC correctly for Google Workspace: the exact records, where to enable DKIM signing, and how to confirm everything passes…
5 ago 2026 · 8 min de lecturaSPF vs DKIM vs DMARC: What Each One Does and Why You Need All
SPF, DKIM and DMARC solve different parts of e-mail trust. See what each checks, how they work together and in which order to set…
3 ago 2026 · 8 min de lecturaWhat Is DKIM and How to Set It Up for Your Domain
DKIM signs every message so receivers can trust it came from your domain. Learn how it works, how to set it up for each…