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Othman Katim

Digital marketer and Email deliverability expert.

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    How To Move To DMARC RejectHow To Move To DMARC Reject
    Othman Katim

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    How To Move To DMARC Reject

    Moving DMARC to p=reject blocks spoofed emails but can break legitimate mail if done wrong. Learn the safe step-by-step process from p=none to full enforcement.

    DMARCBest Practices
    BIMI Requirements ExplainedBIMI Requirements Explained
    Othman Katim

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    BIMI Requirements Explained

    BIMI requires DMARC at enforcement level, a logo in SVG Tiny PS format, and a certificate (VMC or CMC) for Gmail. According to a 2025 URIports analysis, 53.6% of BIMI records contain at least one error. Here's every requirement and how to meet it.

    BIMIDMARC
    How to Add a Logo to EmailsHow to Add a Logo to Emails
    Othman Katim

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    How to Add a Logo to Emails

    Adding your brand logo to emails requires BIMI (Brand Indicators for Message Identification), which displays a verified logo next to your messages in recipient inboxes. Setup requires DMARC enforcement, an SVG Tiny PS logo file, and for Gmail a Verified Mark Certificate.

    BIMIDMARCEmail MarketingEmail Deliverability
    How to Fix SMTP ErrorsHow to Fix SMTP Errors
    Othman Katim

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    How to Fix SMTP Errors

    SMTP errors are response codes that tell you exactly what went wrong when an email fails to deliver. A 550 means the address doesn't exist. A 554 means the server rejected your message. Understanding these codes is the fastest way to diagnose deliverability problems at their source.

    SMTPBest PracticesEmail MarketingEmail Deliverability
    What Is DMARC and How It Works for Email DeliverabilityWhat Is DMARC and How It Works for Email Deliverability
    Othman Katim

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    What Is DMARC and How It Works for Email Deliverability

    Learn what DMARC is, how it works with SPF and DKIM, and how it helps prevent spoofing while improving email deliverability. A clear guide to setting up and understanding DMARC.

    DMARCSPFEmail Deliverability
    SPF vs DKIM vs DMARC: What’s the Difference and Why It MattersSPF vs DKIM vs DMARC: What’s the Difference and Why It Matters
    Othman Katim

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    SPF vs DKIM vs DMARC: What’s the Difference and Why It Matters

    SPF, DKIM, and DMARC are the core protocols behind email authentication. This guide explains how each one works, the differences between them, and why they are essential for improving email deliverability and protecting your domain.

    DKIMDMARCSPF
    Why Emails Go to Spam: Causes, Fixes and Deliverability GuideWhy Emails Go to Spam: Causes, Fixes and Deliverability Guide
    Othman Katim

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    Why Emails Go to Spam: Causes, Fixes and Deliverability Guide

    Emails can go to spam because of authentication issues, poor sender reputation, DNS mistakes, blacklist listings, or weak engagement. This guide explains the main causes and how to fix them.

    Email DeliverabilityBest Practices