Outlook Express automatically sets the line length of messages using plain text format at 76 characters per line, to accommodate servers that do not display more than 80 characters per line. When messages are quoted in a reply, the original text is usually marked and indented with an additional character. If your message is likely to be quoted after posting, set your text to wrap at 70 or 72 characters per line to prevent text from running beyond the edge of the window.