Hard Bounces vs Soft: What Each One Costs You
Hard and soft bounces explained in plain English, and why your sender reputation pays for every one of them.
About
Independent consultancy, based in Scotland, working with clients worldwide. I design, authenticate and manage the systems that affect whether your email lands and earns its keep.
I started in email marketing in 2006, when in comparison to more recent times, delivery was still the wild west. Over the following years I built a managed hosting and consulting business, adapting as the technology and the rules kept changing. That change has accelerated into AI reshaping how email is sent and received, and it shows no sign of slowing down.
I've worked with clients in the UK, Europe, the US and beyond, specialising in delivery systems, email authentication, marketing automation and strategy. MacDougall Email is the continuation of that work: same discipline, same specialities, modern tools.
Twenty years in, the fundamentals are unchanged: authenticated mail reaches the inbox, unauthenticated mail doesn't. Well-managed campaigns convert; poorly managed ones don't. The difference now is that the enforcement mechanisms are unforgiving, and it's hard for businesses to keep up to date with the latest best practices — that's where I come in: keeping your systems current while you run your business.
You work with the person doing the work. No account managers, no outsourcing.
Recommendations backed by tests, reports and measurements — never "trust me".
What will be done, what it costs, and when it will be finished — agreed before anything changes.
Based in Scotland, working with clients wherever they are.

A defined process, agreed before anything changes — the same discipline for a one-off audit, a project, or ongoing work.
Survey — consultation & investigation
We start with a conversation, then a technical survey of your current setup: DNS, authentication records, sending platforms, list hygiene, and what you're trying to achieve. No proposals before diagnosis.
Explain — findings in plain English
You receive a clear picture of what's wrong, what it's costing you, and what fixing it involves. Scope and price are agreed before any changes are made.
Remediate — implementation
The agreed work, done properly: systems configured, records aligned, deliverability improved. Changes documented as they're made.
Verify — proof it works
Tests and reports demonstrating the result — working systems, passing checks, measurable improvement. You see the evidence, not just my word.
Engage — ongoing relationship
Where it makes sense: monitoring, maintenance and defined response windows, so problems are caught before they cost you.
Using this site
The blog carries the working knowledge: authentication, deliverability, and the systems behind both.
Check your own domain's authentication records, and cost out platforms before committing to one.
Consultations, retainers and managed services are arranged directly — contact to discuss further.
Free conversation. Honest assessment. No obligation.
Straightforward guides and updates on authentication, deliverability and overall strategy.
Hard and soft bounces explained in plain English, and why your sender reputation pays for every one of them.
Aggregate reports arrive as unreadable XML. This is a guide to parsing and understanding those files. The fields that matter and the ones to ignore, plus, what each finding means strategically.
New sending infrastructure has no reputation, which receiving servers treat with suspicion. This guide is the staged process for building reputation safely, and the mistakes that can burn it in week one.
Bigger list, more sends. That used to be the whole logic of email marketing. It no longer works like that. How to prune a list, when to do it, and why keeping dead addresses hurts you.