Let me tell you a (true) story that perfectly demonstrates why you should have an email marketing campaign checklist for every campaign you send.

Picture the scene: you’ve just successfully launched your email campaign, basking in the reflective glory of another campaign sent on time, when you receive an email from the Marketing Director, fwd: 为什么用中文发送这封邮件？

‘Hey Phil, I’ve just been forwarded this email from Mark, the sales director in Canada. He received it in Chinese last night. Do you know why he would have got this?’

Oh f@%k, Oh f@%k, Oh f@%k – the panic sets in, the sinking feeling, the churn in the stomach. Please, God, let this be something simple. Logging in to check the campaign ‘He must have got onto the Chinese customer list somehow’ you tell yourself unconvincingly. Nope, not that.

Long and painful story short, I’d included Canadian contacts as part of the segmentation, a schoolboy error that could have easily been avoided.

Mistakes happen; it’s part of life, and none of us is perfect. However, in the world of email marketing, a single slip-up doesn’t just stay between you and your screen – it broadcasts to thousands.

Whether you’re a seasoned professional or just starting in email marketing, these errors feel like the end of the world. Beyond the personal “sinking feeling,” there is a genuine business impact. Sending irrelevant content (like our Chinese-to-Canada disaster) leads to a spike in unsubscribes and, worse, spam complaints. If your spam complaint rate creeps above the industry-standard threshold (usually around 0.1%), mailbox providers like Gmail and Yahoo may start throttling your future campaigns, sending them straight to the spam/junk folder.

To minimise the chance of a “cock up,” you need a system that helps catch human error.
Here are the non-negotiable checks to perform before you hit that final ‘Send’ button:

1. The “Sender” Fields

Before a reader even sees your content, they see the Sender Name, Subject Line, and Pre-header text.

• Sender Name: Is it recognisable?
• Subject Line: Are there any typos? Does it include a “placeholder” you forgot to change?
• Pre-header: This is often overlooked. Ensure it complements the subject line rather than just saying “Having trouble viewing this email?”

2. Copy and Creative

• Links: Click every single link and button. Do they lead to the correct landing pages?
• Personalisation Tags: Ensure your {{FirstName}} tags are working and have a sensible “fallback” (e.g., “Hi Friend”) in case the data is missing.
• Images: Check that images have Alt Text for accessibility and that file sizes aren’t so large that they slow down loading times.

3. Technical and Rendering Tests

An email might look perfect on your desktop but break on a mobile device or in Outlook (especially in Outlook). Use a testing tool or send “test sends” to various devices to check for correct layout rendering.

Send your test sends to a colleague and ask them to check; they will often spot things you haven’t.

Our Chinese email mistake was a segmentation error. No matter how beautiful your design is, it fails if it reaches the wrong person. Before sending, double-check your exclusion lists and inclusion criteria.

If in doubt, have a colleague check the complete campaign set up for you before you hit send

A simple email marketing campaign checklist takes five minutes to follow, but can save you hours of damage control. By implementing these checks, you transition from being a “broadcaster” who hopes for the best to a professional marketer who delivers value with precision.

Don’t wait for your own “Chinese Email to Canadian Contacts” moment. Start using a checklist today and hit send with confiden