A snippet to download emails from an IMAP server based on a list of failed migrations on Google Workspace. These will be saved according to the IMAP folder structure, in a folder named emails.

The entries.txt should be formatted as such:

email@example.com	Email	<029776C1-7F7D-495B-8643-7B6743D6EAA0@example.com>	Sent Items

import imaplib
import email
import os

# IMAP server settings
imap_server = "imap.example.com"
username = "email@example.com"
password = "Password!"

# Read entries from the file
with open("entries.txt", "r") as file:
    entries = file.read().splitlines()

# Connect to the IMAP server
imap = imaplib.IMAP4_SSL(imap_server)
imap.login(username, password)

# Create the "emails" folder if it doesn't exist
if not os.path.exists("emails"):
    os.makedirs("emails")
    
# Iterate over the entries
for entry in entries:
    # Split the entry into its components
    parts = entry.split("\t")
    if len(parts) == 5:
        email_address, _, message_id, folder, _ = parts
    else:
        email_address, _, message_id, folder = parts
    
    # Select the appropriate folder
    quoted_folder = f'"{folder}"'.replace("/", ".")
    status, _ = imap.select(quoted_folder)

    # Replace '/' with '_' in the folder name to avoid creating subfolders
    folder = folder.replace("/", "_")

    # Create the subfolder if it doesn't exist
    subfolder = os.path.join("emails", folder)
    if not os.path.exists(subfolder):
        os.makedirs(subfolder)

    # Search for the message with the specific message ID
    _, message_numbers = imap.search(None, f'HEADER Message-ID "{message_id}"')

    # Iterate over the message numbers
    for num in message_numbers[0].split():
        # Fetch the message
        _, msg_data = imap.fetch(num, "(RFC822)")

        # Parse the message
        email_message = email.message_from_bytes(msg_data[0][1])

        # Generate a unique filename for the EML file
        filename = f"{message_id}.eml"

        # Save the email as an EML file in the corresponding subfolder
        file_path = os.path.join(subfolder, filename)
        with open(file_path, "w") as eml_file:
            eml_file.write(email_message.as_string())

        print(f"Email exported as {file_path}")

# Logout from the IMAP server
imap.logout()
python