(Please try to remember to check which sub forum you are using when you create a new topic. If you're asking for help with your tamagotchi, please use the Help for Tamagotchi Owners and try to remember to include the version you're asking for help with in the title - it makes it much easier for our members to answer your questions and you will probably get a reply quicker)
You get mail from connecting to other IDs or from the now defunct tama-id website. Or you can download some from here and put them onto an IR compatible phone and send them to your ID.