Search creteria for query in mailbox imap_tools library

Question

im trying to query in mailbox with python3 imap_tools , cant uderstand how to extract emails with sender email and unseen flag. Trying like this

for msg in [msg for msg in mailbox.fetch(Q(from_=sender, seen=False))]

And always get same error

imap_tools.utils.UnexpectedCommandStatusError: Response status for command "box.search" == "NO", "OK" expected, data: [b'[CANNOT] Unsupported search criterion: FROM "ZOYA1608@YANDEX.RU" UNSEEN']

Can somebody explain where my mistake, full code below

    with open("..\\conf\\conf.yaml", mode="r") as stream:
        for conf in yaml.safe_load_all(stream):
            with MailBox(conf['host']).login(conf['mailbox'], conf['password']) as mailbox:
                for sender in conf['senders']['from']:
                    for msg in [msg for msg in mailbox.fetch(Q(from_=sender, seen=False))]:
                        for att in msg.attachments:
                            with open(get_path(file_name=att.filename, store_paths=conf['store_paths']), 'w+b') as f:
                                f.write(att.payload)

Answer 1

1. yandex server support From queries
2. A(from_="ZOYA1608@YANDEX.RU", seen=False) works, I checked
3. Do not forget update lib sometimes

Most likely: your server doesn't fully support the IMAP search specification.

Regards, imap_tools author.