Fake Mail or ‘FakeMail’ is a Cydia App that lets users send anonymous email, or more specifically, email from inexistent email addresses. Useful if you want to pull a prank on your friends or just don’t want to be identified on a particular email you’re sending.
By entering your desired email address (yes, you can use any email address, even if it doesn’t exist), name and the address of the person you’re trying to send it to, you can then type up the email you want to send. Then you can just hit "Send" and your message will reach its destination. On the other end, users won’t be able to tell that the sender address is faked, since it will appear like a real address. It’s that good!
This is possible thanks to the structure of email itself. Every email message has a header, where information about the sender (including their email address), recipient and the message’s subject are stored. Since the sender information isn’t verified on the server end in any way, it’s possible to just insert anything into the header. You can try this for yourself by opening any email message on a standard word processor, even Notepad.
The major caveat is the inability to receive replies, since there isn’t a real inbox to reply to. If you’re expecting to do an anonymous exchange, there just is no way to do that using this app.
You can get Fake Mail today from Cydia’s BigBoss repository.
Last but not least, it’s important to note that this app will requires you to jailbreak your phone first, since, just like anything outside the official Apple Store, it’s not approved by Apple. It’s recommended that you have basic skills on how to restore your device, in case something goes wrong.