IMAP4.open

imaplib

method of IMAP4 (source) not WASI

IMAP4.open(host, port, timeout=None)

Setup connection to remote server on "host:port"
    (default: localhost:standard IMAP4 port).
This connection will be used by the routines:
    read, readline, send, shutdown.

© Python Software Foundation. PSF License Version 2 · Official docs ↗

Changed in 3.9

3.9: The timeout parameter was added.