imap server + python + java + Cassandra. What is better to drink?

Question

Python

There is a mail server written a long time ago in Java+Cassandra.

The task is to add an IMAP server to it.

Question 1. Is it wise to do this in Python? What crutches to expect, what would you advise to read.
Question 2. What if we do it in Java? What kind of crutches to expect, what would you advise to read.

Thank you.

Answer 1

either way, no difference.
Who maintains the code? Which is easier to maintain?