Is this problem when you are working on your messages online in Firefox, on a webmail site? ''If your question is about the Thunderbird mail program, a moderator can move your question to the Thunderbird forum.'' I'm pretty sure you'll need to go into the settings for your webmail site and change a setting in there. Can you find it? If not, do you want to mention what site it is, for example, Outlook, Gmail, Yahoo mail, etc.?