Couldn't open stream

[applibs]

Environment (please complete the following information):

• PHP IMAP version: [e.g. 5.0.1]
• PHP Version: [e.g. 8.1.5]
• Type of execution: CLI

Your Text With this setting:

$mailbox->setConnectionArgs(
    CL_EXPUNGE // expunge deleted mails upon mailbox close
    | OP_SECURE // don't do non-secure authentication
);

I always got error: imap_open(): Couldn't open stream

Without that is all good.