For res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM): gaierror: [Errno -2] Name or service not known

Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/email/receive.py”, line 69, in connect_pop
self.pop = Timed_POP3_SSL(self.settings.host, timeout=frappe.conf.get(“pop_timeout”))
File “/home/frappe/frappe-bench/apps/frappe/frappe/email/receive.py”, line 537, in init
self._super.init(self, *args, **kwargs)
File “/usr/lib/python2.7/poplib.py”, line 346, in init
for res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM):
gaierror: [Errno -2] Name or service not known

Apparently a network connection or security issue - say compare a client settings port etc that successfully connects to the mail server with this one that fails…of course google is your friend!