The lines that belong
Six lines, in this order
- Full name. The largest element after the message itself, and the only line that can be a different size from the rest.
- Job title, and department where the company is large enough for it to matter. This is the line that tells the reader whether they are talking to the right person, and it is the line most often out of date.
- Company name, as a word or as the logo, not usually both.
- One phone number. The one you answer. A signature with a desk number, a mobile number and a switchboard number makes the reader choose, and people who have to choose do nothing.
- Website, or the one link that matters most. A meeting link often earns its place better than a homepage.
- The legal disclaimer, where the law or your regulator requires it, in smaller text under everything else.
That is the whole format. Everything else is a candidate for removal.
What professional email signature design means in practice
- Two typefaces at most, and one of them should be the safe fallback every client has.
- One accent colour, used on the name or the link, not spread across every line.
- A width that matches the message body, around 500 to 600 pixels, so the signature does not define the layout.
- Left aligned. Centred signatures read as a certificate.
- Enough contrast to survive being quoted, forwarded and read on a phone in daylight.
- A logo linked at a fixed size with alt text, not pasted in as an embedded image.
Four things to take out
- A quotation. The inspirational line under a signature is the fastest way to date a message, and in a customer thread it is one more thing to disagree with.
- Six social icons. They lead people away from the conversation you are having, and half of them go to accounts nobody updates. Keep the one your company actually uses.
- A picture of a handwritten signature. It adds weight, it renders unpredictably, and a scanned signature is not something to distribute on every message.
- An environmental request. The line asking the reader to think before printing has been in circulation for twenty years and changes nobody's behaviour.
Also worth losing: a second phone number nobody answers, an address block on every internal message, and any image that only makes sense with images turned on.
The same identity in fewer lines
On a phone, a desktop signature becomes four lines of wrapped text and a stretched logo. The mobile variant is not a smaller version of the same design, it is a shorter one: name, title, company, one number. Everything else is noise on a small screen.
On replies, the full block repeated fifteen times down a thread is the most common complaint people have about signatures they otherwise like. A short block on replies, with the full one on the first message, solves it.
Where formats fail
A format written in a document and sent to everybody is a suggestion. What arrives in customers' inboxes six months later is whatever each person managed to paste, plus the job titles that changed since. The format only becomes real when it is a template filled from the directory and deployed to mailboxes.
- The directory holds the name, title, department and phone, so the lines that change most are the lines nobody retypes.
- One design means one decision, and one place to change it.
- Groups let the sales team carry a meeting link while legal carries a longer disclaimer.
- A rollout history means a change that went out wrong is reversed in one click.
See company email signature examples for how the format bends by industry, and email signature management software for the mechanism.