Updated to NAV 4.9.2. Now i noticed the alerts are not sending anymore. The last log i got was this: [2019-02-08 19:18:39,774] [ERROR] [pid=24794 nav.alertengine.alertaddress.send] Unhandled error from Email (the handler has been blacklisted) Traceback (most recent call last): File "/opt/venvs/nav/local/lib/python2.7/site-packages/nav/models/profiles.py", line 373, in send self.type.send(self, alert, language=lang) File "/opt/venvs/nav/local/lib/python2.7/site-packages/django/utils/decorators.py", line 145, in inner return func(*args, **kwargs) File "/opt/venvs/nav/local/lib/python2.7/site-packages/nav/models/profiles.py", line 439, in send return dispatcher.send(*args, **kwargs) File "/opt/venvs/nav/local/lib/python2.7/site-packages/nav/alertengine/dispatchers/email_dispatcher.py", line 52, in send email.send(fail_silently=False) File "/opt/venvs/nav/local/lib/python2.7/site-packages/django/core/mail/message.py", line 303, in send return self.get_connection(fail_silently).send_messages([self]) File "/opt/venvs/nav/local/lib/python2.7/site-packages/django/core/mail/backends/smtp.py", line 100, in send_messages new_conn_created = self.open() File "/opt/venvs/nav/local/lib/python2.7/site-packages/django/core/mail/backends/smtp.py", line 58, in open self.connection = connection_class(self.host, self.port, **connection_params) File "/usr/lib/python2.7/smtplib.py", line 256, in __init__ (code, msg) = self.connect(host, port) File "/usr/lib/python2.7/smtplib.py", line 316, in connect self.sock = self._get_socket(host, port, self.timeout) File "/usr/lib/python2.7/smtplib.py", line 291, in _get_socket return socket.create_connection((host, port), timeout) File "/usr/lib/python2.7/socket.py", line 553, in create_connection for res in getaddrinfo(host, port, 0, SOCK_STREAM): error: getaddrinfo() argument 2 must be integer or string And if i look at my alterengine log, i see the handler is being blacklisted: 2019-02-11 11:35:09,993 [WARNING] [nav.alertengine.alertaddress.send] Not sending alert 16646 to ***** as handler Email is blacklisted: getaddrinfo() argument 2 must be integer or string How to resolve this? Kind regards, René.