Client di posta elettronica Hula (software) Microsoft Outlook Foxmail UUCP JSON Meta Application Protocol Pine (informatica) Microsoft Internet Mail e News Windows Live Mail EM Client Microsoft Entourage Claws Mail Fetchmail Mailbird Post Office Protocol Zimbra Roundcube Pegasus Mail Mutt Alpine (informatica) Posta elettronica Simple Mail Transfer Protocol Internet Message Access Protocol Eudora Evolution (software) KMail Cyberdog Arachne Mozilla Thunderbird SeaMonkey Posta (Windows) Outlook Express