DOWNLOAD & SAVE THIS POST >> CLICK HERE <<By the PromoteLabs team. Updated November 2026.
Before you send any marketing email, check 12 things: one clear goal, a benefit-led subject line, written preview text, a recognizable sender name, scannable copy, one main call to action, working links, mobile layout, merge fields with fallbacks, the right segment, a visible one-click unsubscribe link and the send time. A two-minute check prevents most costly mistakes.
Every email marketer has a horror story. The launch email that went out with a broken buy button. The "Hi FIRSTNAME" greeting sent to 20,000 people. The promotion meant for customers that went to the whole list, including people who had just paid full price.
Pilots do not take off without running through a checklist, no matter how experienced they are. Your emails deserve the same treatment. This one takes about two minutes and catches the mistakes that cost the most.
The 12-Point Checklist
| # | Check | Why it matters |
|---|---|---|
| 1 | One clear goal | Focused emails get more clicks |
| 2 | Subject line with a specific benefit | Drives opens |
| 3 | Preview text written, not left as default | Acts as a second subject line |
| 4 | Recognizable sender name | Builds trust |
| 5 | Short, scannable paragraphs | Most people read on phones |
| 6 | One main call to action | Fewer choices, more clicks |
| 7 | All links tested | Broken links cost sales |
| 8 | Mobile preview checked | Layout problems are common |
| 9 | Merge fields have fallbacks | Avoids "Hi FIRSTNAME" |
| 10 | Right segment selected | Relevance protects deliverability |
| 11 | Unsubscribe visible and one-click | Required by Gmail and Yahoo |
| 12 | Send time chosen | Send when your audience reads email |
The Three Checks That Save the Most Money
Test every link
Click every link in the test email, especially the buy button and any affiliate links. One broken link in a launch email can cost more than every other mistake on this list combined.
Check the segment
Sending a discount to customers who just paid full price, or a "welcome" email to long-time subscribers, damages trust. Take ten seconds to confirm who the email is going to.
Set merge field fallbacks
If you personalize with first names, set a fallback such as "there" so subscribers without a name on file see "Hi there" instead of a broken placeholder.
Stay Out of Spam
Gmail and Yahoo require bulk senders to authenticate with SPF, DKIM and DMARC, offer one-click unsubscribe and keep spam complaints under 0.3%. If any of these are missing, fix them before your next big send. Even a perfect email earns nothing in the spam folder.
Make It a Habit
Print the checklist, pin it next to your screen or save it as a note in your email platform. The goal is not perfection, it is catching the expensive mistakes before your subscribers do. For bigger improvements, read how to get better email marketing results.
And if you need something worth sending, our free products make great lead magnets and bonuses for your list.
Frequently Asked Questions
What should I check before sending a marketing email?
A clear goal, the subject line and preview text, sender name, scannable copy, one call to action, working links, mobile layout, merge field fallbacks, the right segment, unsubscribe link and send time.
What is preview text?
The short line shown after the subject line in most inboxes. Writing it yourself turns it into a second subject line.
What is a merge field fallback?
A default value, such as 'there,' used when a subscriber has no first name on file.
Do I need a one-click unsubscribe link?
Yes. Gmail and Yahoo require bulk senders to offer one-click unsubscribe.
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