How does the Python script in the open-source code handle failures when detecting the Zimbra version?

The Python script first attempts to obtain version information via a specific URL, then tries the IMAP protocol, and finally falls back to IMAP over SSL. This priority is necessary because in some environments, converting an IP to a hostname for IMAP over SSL can fail with an error like '[Errno 11004] host not found.' The complete code is available on GitHub, linked in the original article, and illustrates a practical approach to automating version detection.