dovecot: auth: Error: DNS lookup for xxx failed: Name does not resolve

Marc Roos M.Roos at
Sat Nov 30 21:28:27 EET 2019

I had a working container with dovecot configured as proxy. And all of a 
sudden I am getting these messages 'dovecot: auth: Error: DNS lookup for 
roosit03 failed: Name does not resolve'
Pinging/nslookup these hostnames is ok

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