Professional Email Signatures: What to Include and How to Make Them Work in Gmail and Outlook

In a single week you may send hundreds of emails: quotes, follow-ups, replies to clients. Every one ends with your signature. Yet for many people it’s a line typed in a hurry, or one big image that shows as a strange attachment or not at all, or a design that looks great in Gmail and falls apart in Outlook.

A good signature is a small business card that travels with every message: it introduces you, makes contact easy and reflects your brand. This guide explains what to put in it, how to design it to work in every email client, and how to add it step by step.

Elements of a professional signature

The essentials

• Your name as you want clients to address you.
• Job title and company name.
• Phone number in international format (+966…) so tapping it works from a phone in any country.
• Website.

Useful extras, as needed

• Logo or headshot: small and clear.
• Social links: only the platforms you’re actually active on.
• One action button or link: “Book a call”, “Chat on WhatsApp”, “See our work”.
• Address: for businesses clients visit.

What to avoid

• Long quotes, and more than two typefaces or three colours.
• Every number and every account you have — clutter hides what matters.
• Long legal disclaimers unless your organisation requires them.
• Heavy animated images.

Why not design the signature as one image?

The easy route is to design the whole signature in a design app and insert it as an image. It’s a poor solution for practical reasons:

• Many clients block images by default, so the recipient sees an empty box instead of your name and number.
• Numbers and links inside an image can’t be tapped.
• Text can’t be copied — a client who wants to save your number has to type it.
• It may show as an attachment in some clients, making every email look like it carries a file.
• It’s unreadable to screen readers.

A proper signature is real text, with one small optional image for the logo.

Why signatures are built with tables

Email clients aren’t modern browsers. Outlook on Windows in particular renders messages with an old engine that doesn’t support much modern CSS, and Gmail strips parts of the styling. So the most reliable way to build a signature is what email designers have done for years: HTML tables with styles written inline on each element, and web-safe fonts available on most devices.

Our email signature generator builds signatures this way automatically: tables and inline styles, horizontal or vertical layout, your brand colour, a live preview, and direct copy or HTML download.

Arabic signatures: direction is the challenge

An Arabic signature needs right-to-left direction; otherwise dots, numbers and punctuation land in the wrong places, and the signature aligns left under an Arabic message. Tips:

• Set direction explicitly — RTL for Arabic, LTR for English. The generator picks automatically from the language of your name, and you can set it manually.
• Numbers, email addresses and links stay left-to-right inside an Arabic signature; that’s normal.
• If you write to clients in both Arabic and English, prepare two signatures and pick per message, rather than one that mixes both languages.

How to add the signature to your email client

Gmail

1. Copy the signature from the preview (the “Copy signature” button, not the HTML code).
2. Open Gmail → Settings → See all settings → General → Signature.
3. Create a new signature, paste it into the box, and set it as the default for new emails and replies.
4. Save changes at the bottom of the page.

Gmail limits signature length to a certain number of characters including formatting, so very complex signatures may be rejected.

Outlook

In settings, look for “Signatures”, create one and paste the copied signature. Outlook versions differ (web, new Windows, classic, Mac) and menus vary slightly between them, but direct paste works in most.

Apple Mail and mobile

Apple Mail on Mac accepts pasting in Signatures settings. On phones, mail apps usually support only a simple text signature; if you use Gmail or Outlook on mobile with the same account, the web signature may be used in some cases.

Test before you roll it out

1. Send a test email to yourself on Gmail, and on Outlook if possible.
2. Open it on desktop and phone, and in dark mode.
3. Tap the number, email and links to make sure they work.
4. Check the logo appears, and that the signature is readable even with images blocked.

The signature as a small marketing tool

• A direct WhatsApp link with a pre-filled message from our WhatsApp link generator turns a reader into a conversation in one tap.
• UTM links on your website and action button, from our UTM builder, show in Google Analytics how many visits your team’s signatures bring.
• A small temporary campaign banner under the signature for an offer or event — removed when it ends.
• One signature design for the whole team, with only the details changing — one of the simplest and most visible applications of visual identity.

One signature for a whole team

When every employee’s signature uses a different font, colour and layout, the company looks disorganised however good its work. Standardising signatures is one of the fastest, cheapest improvements:

1. Adopt one design: layout, brand colour, logo and field order.
2. Define required and optional fields: name, title and phone are required; the extra button varies by department (sales “Book a call”, support “Help centre”).
3. Host the logo once on the company website and use the same URL for everyone.
4. Prepare an HTML file per employee from the generator, or send them the link to build theirs with the same settings.
5. Document the setup steps for the email client your company uses, and review signatures whenever the brand or campaigns change.

Companies on Google Workspace or Microsoft 365 can also enforce a standard signature from the admin console or with dedicated tools — but a table-based design remains the foundation either way.

Key takeaways

• A signature should be real, tappable, copyable text — not one image.
• Build it with tables and inline styles so it works in Gmail and Outlook.
• The logo should be a small hosted image linked over https.
• Set direction: RTL for Arabic, LTR for English — ideally two separate signatures.
• Test on several clients and devices, and in dark mode, before rolling it out.

Frequently asked questions

Why does my logo show as an attachment?

Usually because it was uploaded from your device rather than linked as a hosted image. Use an https link to an image on your website.

Why does spacing look different in Outlook?

Outlook’s engine handles spacing and margins differently. Signatures built with simple tables are least affected; small differences remain normal.

Headshot or company logo?

A headshot builds a closer relationship in sales and consulting; a logo suits shared inboxes and support teams. Choose one, not both.

Your signature is seen more than any ad you pay for. Build one that works in every email client in a minute with our free email signature generator — and if you want a consistent visual identity for your team, including signatures and templates, get in touch.