Email sync error

Hi I have a custom deployed erpnext on a debian vm instance in gcp. Everything is fine but when I connect my yandex mail server following error shows up in error log please help me.

Traceback (most recent call last):
File “/home/bench/frappe-bench/apps/frappe/frappe/email/doctype/email_account/email_account.py”, line 254, in receive
email_server = self.get_incoming_server(in_receive=True, email_sync_rule=email_sync_rule)
File “/home/bench/frappe-bench/apps/frappe/frappe/email/doctype/email_account/email_account.py”, line 180, in get_incoming_server
frappe.throw(e.message)
File “/home/bench/frappe-bench/apps/frappe/frappe/init.py”, line 356, in throw
msgprint(msg, raise_exception=exc, title=title, indicator=‘red’)
File “/home/bench/frappe-bench/apps/frappe/frappe/init.py”, line 342, in msgprint
_raise_exception()
File “/home/bench/frappe-bench/apps/frappe/frappe/init.py”, line 315, in _raise_exception
raise raise_exception(msg)
ValidationError: command: CAPABILITY => Autologout; idle for too long