MailShell does not authenticate where the email came from
MailShell is a daemon that allows you to execute shell commands over your email.
It's useful in situations where remote access is required and using SSH is not possible, for example on machines with dynamic IP addresses. I wrote it to access my computer at home from my phone over email.
Binaries for macOS and Linux are available.
$ mailshell -help
Send an email to the email account you used with MailShell with the subject line in the format
mailshell [shell command] and MailShell will run the command and reply with the output.
MailShell checks the last 4 emails for that subject line.
Copyright (C) 2017 Nabeel Omer