Hi All,
We are hitting a bug with LAVA 2021.08: email notifications seem to be broken.
We believe this is due to a bug between eventlet 0.26.0 and dnspython.
Visibly, this is fixed in eventlet 0.32.0: 
https://github.com/eventlet/eventlet/issues/619
Did you face the same bug?
Any idea about how to fix that?
Thanks a lot,
Philippe
Trace below:
ERROR:lava_scheduler_app:[Errno -3] Lookup timed out
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/eventlet/support/greendns.py", line 435, in resolve
    return _proxy.query(name, rdtype, raise_on_no_answer=raises,
  File "/usr/lib/python3/dist-packages/eventlet/support/greendns.py", line 391, in query
    return end()
  File "/usr/lib/python3/dist-packages/eventlet/support/greendns.py", line 370, in end
    raise result[1]
  File "/usr/lib/python3/dist-packages/eventlet/support/greendns.py", line 351, in step
    a = fun(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/dns/resolver.py", line 1089, in query
    return self.resolve(qname, rdtype, rdclass, tcp, source,
 File "/usr/lib/python3/dist-packages/dns/resolver.py", line 1043, in resolve
    timeout = self._compute_timeout(start, lifetime)
  File "/usr/lib/python3/dist-packages/dns/resolver.py", line 950, in _compute_timeout
    raise Timeout(timeout=duration)
dns.exception.Timeout: The DNS operation timed out after 5.104917526245117 seconds