How to convert IMAP to POP3

Question

I have an email server that only have IMAP interface. On the other side, I have another Special-purpose mail client (a kind of embedded system) that only accepts POP3 protocol.

How can I connect the client to the server? I should obviously run something on my own machine (with valid IP) to act as a relay/middleware/converter. Is it possible to do it using a bash/python script or make a standard linux tool to get the job done?

P.S. I cannot access neither the client nor the server to install/program anything.

P.S. The script may be active or passive, i.e. it may check IMAP when it receives a POP3 request, or may pro-actively fetch IMAP emails itself.

Thanks

Answer 1

There's a unix/Linux tool just for that. It's called fetchmail and is some sort of commandline mail client.

You could easily configure it on a middleman server to fetch your imap mailbox, sync it to the local mailserver and configure that mailserver as pop3 on your remote pop3 only client.