The HTML Mail page has the following options:Turns animation on or off. Some people do not like HTML mail, and you can set Evolution to warn you of this preference. This warning appears only when you send HTML mail to people in your contacts who are listed as disliking HTML. You can embed a image in an e-mail and have it load only when the message arrives. However, spammers can use image loading patterns to confirm live addresses and invade your privacy. You can elect to never load images automatically, to load images only if the sender is in your contacts, or always load images. If you have chosen not to load images automatically, you can choose to see the images in one message at a time by selecting View > Message Display > Load Images. The Colors tab lets you select different color labels for individual messages. Return to the default settings by clicking Restore Defaults.
