[sharebymail] Error: Swift_TransportException: Expected response code 250 but got code "550", with message "550 Request failed; Mailbox unavailable
" at <<closure>>

 0. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 341
    Swift_Transport_AbstractSmtpTransport->assertResponseCode("550 Request fai ... n", [250])
 1. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/EsmtpTransport.php line 305
    Swift_Transport_AbstractSmtpTransport->executeCommand("\r\n.\r\n", [250], [], false, null)
 2. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 404
    Swift_Transport_EsmtpTransport->executeCommand("\r\n.\r\n", [250])
 3. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 500
    Swift_Transport_AbstractSmtpTransport->streamMessage(Swift_Message {})
 4. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 516
    Swift_Transport_AbstractSmtpTransport->doMailTransaction(Swift_Message {}, "previtech@ymail.com", ["punisher81@libero.it"], [])
 5. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 206
    Swift_Transport_AbstractSmtpTransport->sendTo(Swift_Message {}, "previtech@ymail.com", {punisher81@libero.it: null}, [])
 6. /var/www/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Mailer.php line 71
    Swift_Transport_AbstractSmtpTransport->send(Swift_Message {}, [])
 7. /var/www/nextcloud/lib/private/Mail/Mailer.php line 204
    Swift_Mailer->send(Swift_Message {}, [])
 8. /var/www/nextcloud/apps/sharebymail/lib/ShareByMailProvider.php line 422
    OC\Mail\Mailer->send(OC\Mail\Message {})
 9. /var/www/nextcloud/apps/sharebymail/lib/ShareByMailProvider.php line 335
    OCA\ShareByMail\ShareByMailProvider->sendMailNotification("Didattica in presenza.pdf", "https://overcas ... r", "admin", "punisher81@libero.it", null)
10. /var/www/nextcloud/apps/sharebymail/lib/ShareByMailProvider.php line 185
    OCA\ShareByMail\ShareByMailProvider->createMailShare(OC\Share20\Share {})
11. /var/www/nextcloud/lib/private/Share20/Manager.php line 801
    OCA\ShareByMail\ShareByMailProvider->create(OC\Share20\Share {})
12. /var/www/nextcloud/apps/files_sharing/lib/Controller/ShareAPIController.php line 614
    OC\Share20\Manager->createShare(OC\Share20\Share {})
13. /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 169
    OCA\Files_Sharing\Controller\ShareAPIController->createShare(OC\Files\Node\File {}, 17, 4, "punisher81@libero.it", "false", "", null, "", "")
14. /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 100
    OC\AppFramework\Http\Dispatcher->executeController(OCA\Files_Sharin ... {}, "createShare")
15. /var/www/nextcloud/lib/private/AppFramework/App.php line 152
    OC\AppFramework\Http\Dispatcher->dispatch(OCA\Files_Sharin ... {}, "createShare")
16. /var/www/nextcloud/lib/private/Route/Router.php line 308
    OC\AppFramework\App::main("OCA\\Files_Shar ... r", "createShare", OC\AppFramework\ ... {}, {action: null,_r ... "})
17. /var/www/nextcloud/ocs/v1.php line 88
    OC\Route\Router->match("/ocsapp/apps/fi ... s")
18. /var/www/nextcloud/ocs/v2.php line 24
    require_once("/var/www/nextcloud/ocs/v1.php")

POST /nextcloud/ocs/v2.php/apps/files_sharing/api/v1/shares
from xx.x.xxx.xxx by admin at 2020-12-02T15:44:19+00:00