As a visual aid, KMail will colour verified email messages green for trusted signatures; yellow for untrusted signatures; red for invalid signatures; and blue for encrypted messages.
作為視覺輔助，KMail將電子郵件用綠色表示為信任憑証；黃色不可信憑証；紅色為無效憑証；和藍色的加密郵件。