An email signature is a block of text and images automatically appended to the end of outgoing emails. It typically contains the sender’s name, job title, company, contact details and links, and is usually inserted by the email client rather than typed into each message.
An HTML email signature is a signature built with HTML markup instead of plain text. Because the formatting travels inside the message, the layout, fonts, colours, images and links render consistently across different email clients rather than being stripped or reflowed.
An email signature generator is a tool that builds an email signature visually — through a form or drag-and-drop editor — and outputs the finished signature as HTML you paste into your email client. It removes the need to write markup or measure image dimensions by hand.
An email signature template is a pre-designed signature layout you fill in with your own details instead of building the structure yourself. Templates define where the name, job title, contact details, logo and social icons sit, so the result stays visually consistent.
A Gmail signature is a signature stored in Gmail’s own settings and attached automatically to messages you send from that account. It is managed under Gmail → Settings → See all settings → General → Signature, and can hold HTML pasted from a signature generator.
An Outlook signature is a signature configured in Outlook’s settings and applied to new messages, replies or forwarded mail. It is managed under File → Options → Mail → Signatures on the desktop app, and an equivalent settings area in Outlook on the web.
An Apple Mail signature is a signature created in the Mail app on macOS and assigned to one or more accounts. It is managed under Mail → Settings → Signatures, and can contain pasted HTML exported from a signature generator.
An email disclaimer is a short legal or confidentiality notice appended to an email, often alongside the signature. It usually states that the message is intended only for the named recipient, how confidential information should be handled, and any regulatory requirement the sender must meet.
Email branding is the practice of applying consistent visual identity elements — logo, colours, typography and tone — to outgoing email. A branded signature is usually the most visible part of it, because it appears on every message an employee sends.
An email banner signature is a signature that includes a horizontal image below or beside the contact details, usually promoting an event, campaign, product or social cause. The banner gives the signature a call to action beyond simply identifying the sender.
Cross-client compatibility means a signature rendering the same way across different email clients — Gmail, Outlook, Apple Mail, Yahoo Mail, mobile apps and webmail. It is achieved by using restricted, widely supported HTML such as table-based layouts, inline CSS and standard web-safe fonts.
Email signature image size is the pixel dimensions and file weight of the images inside a signature. Logos are commonly kept around 40–60 pixels tall and a few kilobytes so the signature stays fast to load and is not resized or blocked by the recipient’s client.