Email signature design tips: what makes one look great

A well-designed email signature communicates competence before a single word of your email is read. A poorly designed one — tiny text, crammed contact details, broken images — does the opposite. Here are the principles that separate the two.

1. Keep it to four or five lines maximum

The most common mistake is including too much. Your name, title, company, one phone number, and one or two links are enough. If you feel like you need more, ask yourself whether a recipient would genuinely use each piece of information.

2. Use one accent color, applied sparingly

A single color used for your name, dividers, or links is enough. Two or more competing colors make a signature look like a flyer. Your accent color should match your brand or website — pick from your logo palette if you have one.

3. Stick to web-safe fonts

Custom fonts do not load reliably in email clients. Gmail and Outlook will substitute a system font when a custom one is unavailable, and the result often breaks your layout. Arial, Helvetica, Georgia, and Verdana are safe. Calibri is safe for Outlook recipients.

4. If you use a photo, make it small and crisp

A headshot in a signature can help in roles where relationships matter — sales, consulting, recruiting. If you include one, use a 40–60 px circle or square crop, not a full portrait. A large photo pushes contact details off screen and can trigger spam filters on certain email servers.

5. Do not use tables to fake columns if you can avoid it

A photo on the left, text on the right looks clean in a preview tool but often breaks in Outlook because of how it handles table cell widths. If you need a two-column layout, test it across Gmail, Outlook, and Apple Mail before rolling it out.

6. Make links visible but not distracting

Use icon links (LinkedIn, GitHub) or plain underlined text. Avoid long raw URLs — they clutter the visual and get truncated in narrow viewports. If you link to a website, use a domain: "acme.com" reads better than "https://www.acme.com/home".

7. Leave whitespace between sections

A separator — a thin horizontal line or a simple pipe character — between your name block and contact details gives the eye a clear place to stop and re-focus. Without it, the signature reads as a wall of text.

8. Check it in dark mode

Many email clients now apply dark mode to incoming messages. A black logo on a white background disappears in dark mode. Use a version of your logo that works on dark backgrounds, or choose a design that relies on color rather than black-on-white contrast.