slowmail.py

import imaplib

HOST = "mail.messagingengine.com"
USER = "barik@fastmail.com"
PASSWORD = "password"

BATCH_FOLDER = "INBOX.Batch"
INBOX_FOLDER = "INBOX"


def batch_mail():
    server = imaplib.IMAP4_SSL(HOST)
    server.login(USER, PASSWORD)
    server.select(BATCH_FOLDER)

    typ, [msg_uids] = server.uid("SEARCH", "ALL")

    msg_uids = ",".join(msg_uids.split(" "))

    if msg_uids:
        server.uid("COPY", msg_uids, INBOX_FOLDER)
        server.uid("STORE", msg_uids, "+FLAGS.SILENT", r"(\Deleted)")
        server.uid("EXPUNGE", msg_uids)

    return msg_uids


# noinspection PyUnusedLocal
def lambda_handler(event, context):
    return batch_mail()


if __name__ == '__main__':
    batch_mail()