Fill in your details, check the preview, then copy and paste it into your email signature settings. The logo loads from the Karuna website, so it shows up for everyone who receives your email.
Outlook (desktop & web)Settings → Mail → Compose and reply → Email signature. Paste into the box with Ctrl+V, name it "Karuna", set it as default for new messages and replies, then Save.
GmailSettings (gear) → See all settings → General → Signature → Create new. Paste, then scroll down and click Save changes.
Apple Mail / iPhoneMail → Settings → Signatures. On iPhone, paste, then shake to undo if formatting is stripped and paste again. Untick "Always match my default font" on Mac.