A Guide to Crafting a Good Email Signature

While a witty subject line might get your email opened, and an engaging copy could facilitate conversion, a good email signature is what leaves a lasting impression. It also helps your email marketing by communicating your business offerings, establishing credibility, and wrapping up exchanges with professionalism.

This article discusses the importance of a solid email signature, and provides tips that will help you come up with the perfect signature for your business.

Why you need to pay attention to your email signature

Our inboxes get filled with emails every day. And as touched upon earlier, while the subject line might get you to open it, it’s often the signature that lets you know that the email’s legit. It’s essentially your digital business card, which means just like physical ones, yours should be:

  • Informative
  • Easy to read
  • Clean

What you need to include

All the essential information should be included in your email signature, such as:

  • Name
  • Organization
  • Designation
  • Contact information (at least one)

Benefits of a good email signature

Increased conversions

Your email body might have the main CTA, but your signature presents you with one last opportunity for conversion, be it a social follow, or an RSVP to an event. As you can see in the example below, you can include social icons to encourage recipients to check out your social platforms. This could provide an additional boost to your social media strategy. Additionally, if you have an upcoming event, you can promote it with a promotional banner as Toby Jones does.

Boosts brand awareness

One of the branding strategies that you should apply is to include your brand in your email. If you’re using your email for business, make sure that the signature style is aligned with your branding. As such, use the same color scheme as your brand logo whenever applicable.

Of course, you should keep in mind that one of the main goals of an email signature is to exude professionalism. This means you should avoid too many flashy elements as you can see in the example below.

Tips for designing an email signature

Create your signature with mobile in mind

Mobile accounts for 46% of all email opens. This not only puts weight on mobile application security, it means that after you create your email signature, you should test it for mobile compatibility. Different email clients use different HTML rendering engines, which could result in varied ways of displaying email signatures.

A good practice is to use vertical layouts as wide ones could end up looking squashed, while images could be scaled up leading to them being blurry.

Efficient image use

Speaking of images, make sure that you keep your image file small, so that it fits with the rest of your signature’s elements. As well, limiting yourself to a maximum of two images keeps your signature looking clean.

Include only the essentials

A good practice is to ask yourself, “Would I give this information to a business associate I just met?” If your answer is yes, then include it in your signature. Here are some of the basics:

  • Full name
  • Designation
  • Company
  • Contact details (mobile, office number and address)
  • Website and social icons

Limiting the information you provide to only the essentials not only makes your signature uncluttered, it also makes it easier for your recipient to find the information they need.

Make optimal use of space

Similar to websites, having a design hierarchy that draws attention to the most important information is integral to a good signature. You can do this simply by adjusting fonts’ size, weight, and color, as well as with the alignment and positioning of all other elements.

Dividers are also commonly used to define information hierarchy as you can see below.

Consider font use

Fonts play a crucial role in the look and feel of an email signature. As much as possible, avoid using multiple fonts. Instead, contrast the font by adjusting its weight and size. Similarly, a good signature shouldn’t have more than 2-3 different sizes. This keeps it clean and professional.

Consider image use

Unless your role entails dealing directly with the public, stick to company logos as opposed to profile pictures. To ensure that it works across all devices, use PNG or JPEG formats. You can even compress images with tools like TinyPNG to ensure maximum compatibility.

Keep in mind that PNGs are ideal for logos, while JPEGs works best for profile pictures, as it provides higher color quality.

Keep your eyes on the size

There are two essential things to check when it comes to email signature size:

Pixels – This determines how big your signature is. As noted by Web Designer Depot, for desktops and larger screens that don’t need to scale, the recommended maximum email signature size is 700(w) x 300(h) pixels. For mobile, it’s 320(w) x 600(h).

KB – This refers to the amount of disk space your signature takes up when stored on a mail server. Because you’re likely to send a bunch of emails within the day, a large signature size in KB eventually adds up. Shoot for keeping it under 50KB.

To check if you have the right signature size, simply right click on it and click “inspect element.” This should show you the height and width of your signature.

Test it!

As mentioned earlier, once you tick off all the items in the good signature checklist, take time to test its compatibility across popular email clients. While you can’t ensure that your signature will work flawlessly on all email clients, sending from Outlook 2013 and 2016 to Gmail and vice-versa should give you a good enough idea of its compatibility.


With all the focus on email subject lines, engaging content, and automation, it’s easy to overlook the important role a solid email signature plays in the grand scheme of things. But while a subject line might lead to getting noticed in your customer’s inbox, your signature is what allows you to stay in the minds of your recipients.

Make sure your email signature is informative, clean, and concise. This ensures that you come off as both credible and professional.

What’s the best email signature you’ve seen? Sound off in the comments.

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