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Latest writing

Sender reputation
22 April 2026

Email Blocklist - How to Check If Your Domain Is on one

Email Blocklist as a concept is often forgotten about by those outside of deliverability. If your emails have started landing in spam, or your open rates have dropped without an obvious explanation, one of the first things to check is whether your domain or sending IP is on an email blocklist. It is not always [...]

James Deacon
Authentication
15 April 2026

SPF, DKIM and DMARC Explained (And Why Getting Them Wrong Is Costly)

Most marketing teams have heard of SPF, DKIM and DMARC. Fewer know what they actually do, how they work together, or what happens when they are not set up correctly. That matters, because misconfigured authentication is one of the most common causes of deliverability problems. Emails that should reach the inbox end up in spam. [...]

James Deacon
Sender reputation
15 April 2026

What Is Sender Reputation and How Do You Protect It?

If your emails are going to spam, or your open rates have been quietly declining, sender reputation is usually the first thing worth looking at. It is one of the most important factors in deliverability, and genuinely one of the least talked about in practical terms. Most teams know it exists. Fewer know what actually [...]

James Deacon
Strategy
25 March 2026

Why Have My Email Open Rates Dropped Suddenly?

If your email open rates have dropped and you're not sure why, you're not alone. It's one of the most common questions UK marketing teams search for, and the answer is rarely simple. The frustrating part is that a drop in open rates can mean several different things. Some of them are serious. Some of [...]

James Deacon
Strategy
13 August 2025

Email Security Compliance in 2025: The Complete Guide for UK Fintech and SaaS Leaders

Executive Summary The Bottom Line: Email Security Compliance and authentication moved from "best practice" to mandatory requirement in 2025. UK fintech and SaaS companies face regulatory deadlines, compliance penalties up to £100K+, and significant security risks without proper DMARC implementation. Introduction: The Email Security Turning Point Please note this blog entry is information presented based [...]

James Deacon
Strategy
3 June 2025

How do I Check My Deliverability (and What to Do If It's Off Track)

If you're sending emails and wondering whether they're actually landing in inboxes, you're asking the right question: how do I check my deliverability? In 2025, with mailbox providers enforcing tougher sender requirements, deliverability is no longer just a technical metric: it's a revenue lever. Poor deliverability means you're effectively invisible, no matter how good your [...]

James Deacon
Authentication
8 January 2025

Email Deliverability: The Impact of Sending Architecture & Authentication

Building a solid sending infrastructure is like constructing the foundation of a high-rise building; without it, everything above is at risk. For growth-focused teams in Marketing, CRM, and IT, the first step in your email journey is to ensure that your sending architecture is robust and reliable. Think of it as building a sturdy bridge. [...]

James Deacon
Strategy
29 July 2024

Boost Email Campaign Success with an Email Deliverability Audit

Email marketing remains a powerful tool for engaging with customers and driving conversions. However, even the most well-crafted email campaigns can fall flat if your emails aren't reaching the inbox. This is where an email deliverability audit comes into play. [...]

James Deacon
Series

The deliverability fundamentals

A six-part series that covers everything a CRM manager or marketing ops lead should understand about how email actually reaches the inbox. Read in order, or jump to the part you need.