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To make your emails look more professional, turn your general brand standards into a short set of email-specific rules, then apply them to marketing emails, newsletters, and employee signatures. The rules have to account for things a printed brochure never faces: images that are blocked by default, different inbox software, phone screens, and readers who use assistive technology. This guide walks through the six steps that matter most, in the order you need them.
Why email needs its own brand rules
Your existing brand guidelines describe logos, colors, fonts, and tone. They rarely say what happens when a logo is an image that a recipient’s client hides, when a brand typeface does not exist on the reader’s device, or when a long header pushes the call to action below the fold on a phone. Litmus, an email testing and design company, describes email guidance as an extension of existing brand and style rules, with extra provisions for email’s technical constraints. [Litmus, “Email Marketing Design Best Practices: 17 Key Things to Know,” 2024]
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The practical result is a separate email brand guide. It does not replace your master brand book. It translates it into rules a designer, a copywriter, or a salesperson can follow when they build an email or update a signature without asking for help every time.
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Step-by-step: building an email brand system
Step 1: Collect the brand rules you already have
Start by gathering what exists: approved logo files, color values, typography, voice and tone guidance, image rules, legal disclaimers, and standard boilerplate copy. Note which items are current and which are out of date, and write down who approves changes to each one. Most email inconsistency comes from two versions of the same asset circulating at once, so this inventory is worth the time.
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Step 2: Define the email experience
Set rules for the elements a recipient sees before they open the message and in the first few seconds after:
- Sender name: a fixed format, such as a person’s name plus the company name, or a department name for system messages.
- Subject line and preview text: length limits and the tone you use. Preview text is the snippet shown beside the subject in many inboxes, so give it a rule of its own rather than leaving it to the template default.
- Plain-text alternative: whether every send includes one, and who writes it.
- Fallback fonts: the stack to use when your brand typeface is not supported by a recipient’s email client. Litmus’s guidance treats fallbacks as part of the brand rules rather than an afterthought.
Step 3: Create reusable design pieces
Document the parts of the template that should stay the same across campaigns:
- Logo size, minimum clear space, and placement in headers and footers.
- Image treatment, including crop ratios and whether photos carry a border or overlay.
- Navigation and footer structure.
- Reusable content modules, such as a hero block, a product grid, and a text-plus-button block.
- Primary and secondary call-to-action styles, with approved wording for each.
Make the modules flexible. A newsletter may need a module removed and a campaign may need one added, and the template should allow either without breaking brand recognition. Brand rules that lock everything in place tend to be ignored by the people who send the most email.
Step 4: Build accessibility into the design rules
Accessibility rules work best as part of the template, not as a checklist at the end. Prefer these approaches:
- Use live text for headlines, body copy, and buttons instead of putting words inside an image. Live text can be read by screen readers, resized, and displayed when images are blocked.
- Keep a logical heading order so the message makes sense when read in sequence.
- Do not rely on color alone to show meaning. A red error label should also say “Error” or carry an icon.
- Write alt text for meaningful images, describing what the image conveys in context. Government guidance on email signatures says that when an image sits in a signature block, its alt text should convey that image’s meaning.
- Check text contrast against its background.
For typography, the UK Office for National Statistics specifies Arial at a minimum 12-point size in its own email guidance. That is the agency’s implementation, not a universal standard. Choose a minimum size that suits your audience and document it as your rule.
Step 5: Standardize employee signatures
A signature is the most-seen branded element a company produces, and it is often the least controlled. A good standard keeps it short and scannable:
- Name and title in plain text.
- One primary contact channel plus a phone number if your team takes calls.
- Company logo at a fixed size, with alt text.
- A small number of links, such as the main website and one profile. Limit social icons to the most important ones.
- Required legal text, if your jurisdiction or industry needs it, kept in a single approved block.
Litmus advises using uniform icon sizes and checking every signature with images blocked, so that the name, role, and phone number still appear as readable text. Decide who owns the signature: some organizations let each employee edit their own, while others assign signatures centrally. A vendor guide describes centrally assigned signatures in Outlook and Gmail; that is the vendor’s description of its product, and the capabilities of your own email platform should be confirmed against its current documentation before you commit to a process.
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Before a template or signature standard goes live, check it in the situations your audience actually uses:
- Open the email on a desktop client and on a phone. Confirm the logo, headline, and primary button are visible without scrolling far.
- Turn off images in the client and confirm the message still reads correctly.
- Click every link and confirm it lands where intended.
- Check contrast and heading order.
- Send tests to the email clients that make up most of your list. Your own analytics or CRM will show which those are.
The ONS points its staff to the paid Litmus service for testing across clients and browsers. Manual testing works for a small team; a larger sender may find a dedicated preview tool saves time. Either way, assign one owner for the guide and set a review date. Litmus recommends reviewing the guide at least once a year, and checking consistency again whenever you migrate to a new email service provider.
How to choose between approaches
Whether you are setting rules for a five-person team or a large organization, the same criteria apply. Use them to decide how much control to centralize and which tools are worth paying for:
| Criterion | What to ask |
|---|---|
| Brand control | Can people change logos, colors, or fonts, and who approves that? |
| Rendering across clients and devices | Have you checked the clients your audience uses, on phones and desktops? |
| Accessibility support | Does the template use live text, alt text, and sufficient contrast by default? |
| Ease of editing and reuse | Can a non-designer add or remove modules without breaking the layout? |
| Maintenance burden | Who updates the guide and the templates when brand assets change? |
| Fit with organization size | Does one sender need a simple guide, while many senders need central control of signatures? |
The sources discussed these considerations but did not establish a single best platform, so the right answer depends on your own email setup.
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The guidance above rests on established email practice and official examples, but it is not a single universal email branding standard. There is also no direct study showing that a particular branding change improves sales. Treat business results as goals you are working toward, not outcomes the rules guarantee.
Two survey figures circulate in this area. In a 2025 poll reported by Litmus, 8% of respondents said they were confident about email readiness, 2% said they were somewhat prepared, 19% said they were still figuring it out, and 71% were asking what the European Accessibility Act was. That is one poll’s result, not a measure of the whole industry or of current readiness. Litmus’s 2022 article repeated survey figures from G2 on customer expectations for design and consistency; those are secondhand, so cite them as Litmus’s attribution if you use them at all.
Email client behavior, vendor features, and legal requirements all change. Check accessibility and signature obligations against the rules that apply in your country and sector.
Process advice from the field
Hannah Tiner, Digital Communications Specialist at AFSCME and a former Marketing UX Designer at Litmus, describes how she scopes a new email project: “Process-wise, I ask as many questions as possible to get the project’s scope, so I can understand what type of content will be in the email. Especially if it’s something like a new newsletter, I want to make sure I’m asking for everything and the kitchen sink.” [Litmus, “Email Marketing Design Best Practices: 17 Key Things to Know,” 2024]
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Her approach points to a useful habit: gather the full content list before designing, so the template can accommodate it. That is much easier than retrofitting a finished design when the newsletter adds a section halfway through production.
Your email brand guide is finished when a new team member can build a compliant email or signature without asking for a template. Keep it short, keep it current, and assign one person to answer questions about it.
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