IMAP or POP3 and SMTP-Connector for Open-XChange

My question is quite simple, but I was unable to find anything: I need a program like this

This program is for Exchange Server.

Instead of receiving emails directly via SMTP (you’d need a fixed IP always-on Internet connection for that), POPcon will download your POP3 and IMAP email periodically and then forward it to your Exchange Server.

I need something similar for Open-Xchange


Nevermind. What I was searching for was fetchmail.