Error setting up platform smtp

Just upgraded to 109.3 and noticing the following:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/notify/__init__.py", line 77, in async_setup_platform
    platform.get_service, hass, p_config, discovery_info
  File "/usr/local/lib/python3.7/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/components/smtp/notify.py", line 83, in get_service
    if mail_service.connection_is_valid():
  File "/usr/src/homeassistant/homeassistant/components/smtp/notify.py", line 137, in connection_is_valid
    server = self.connect()
  File "/usr/src/homeassistant/homeassistant/components/smtp/notify.py", line 123, in connect
    mail = smtplib.SMTP(self._server, self._port, timeout=self._timeout)
  File "/usr/local/lib/python3.7/smtplib.py", line 251, in __init__
    (code, msg) = self.connect(host, port)
  File "/usr/local/lib/python3.7/smtplib.py", line 336, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "/usr/local/lib/python3.7/smtplib.py", line 307, in _get_socket
    self.source_address)
  File "/usr/local/lib/python3.7/socket.py", line 728, in create_connection
    raise err
  File "/usr/local/lib/python3.7/socket.py", line 716, in create_connection
    sock.connect(sa)
OSError: [Errno 101] Network unreachable

Was working fine prior to this. This is my config.

- name: send_mail
  platform: smtp
  server: smtp.gmail.com
  port: 587
  timeout: 15
  sender: !secret SMTP_sender
  encryption: starttls
  username: !secret SMTP_username
  password: !secret SMTP_password
  recipient:
    - !secret SMTP_recipient_1
  sender_name: My Home Assistant
lookup smtp.gmail.com
Server:         172.30.32.3
Address:        172.30.32.3#53

Non-authoritative answer:
Name:   smtp.gmail.com
Address: 172.217.222.108
Name:   smtp.gmail.com
Address: 2607:f8b0:400d:c04::6d

Must be something on startup.

I’m getting the same. Do you have a firewall on your netwrok?