Looking for a mail server with Python backend.

[HellCat]

Can anyone here point me to a mail server with a
Python backend? The Java Apache Mail Enterprise server
is for Java, is there a comparable mail server for Python?
I could install JAMES but I prefer to use Python rather
than Java.

I am going to use it in a small (less than 500 users)
enterprise setting so my requirements are not that strict.

Thanks in advance.