The Gmail Bookmarklet will add a unique string to the email signature to prevent Gmail from trimming the content. The hex color code for the appended text is #444 so it will not be prominently displayed in Gmail.
/* Gmail Trim Bookmarklet */ /* Are the ellipsis shown in the Gmail message */ var showtrim = document.querySelector(".aH1"); if (showtrim) { /* If yes, click to expand the trimmed content */ showtrim.click(); } /* Does your email message have a signature */ var gmail = document.querySelector("div.gmail_signature"); /* Get the unique message ID assigned by Gmail */ var id = document.querySelector("input[name='composeid']"); if (gmail && id) { /* Append the current Date and ID to the signature */ gmail.innerHTML += "
Message #" + id.value + " sent on " + new Date().toString() + ""; } /* Written by Amit Agarwal amit@labnol.org */ /* For updates, see http://www.labnol.org */