Subj : ODD DNS behaviour on Pi ZERO W with Bullseye OS
To   : All
From : The Natural Philosopher
Date : Tue Nov 18 2025 12:08:31

As part of my enhancements to the home controller, I want to send email 
warnings of low heating oil level.

So I removed exim which was too much like hard work, installed PostFix 
and all is well...,except it isn't.

If I send a mail out of the blue after a a few hours delay, the mail 
immediately *always* gets stuck in the queue with a message about being 
unable to determine the IP address of the SMTP relay.

If I send another message everything Just Works, and indeed the h mail 
queue gets flushed eventually as well with a successful delivery.

I have looked on line but not found this exact behaviour mentioned 
anywhere..

I am not sure what is running DNS on that Zero W right now. But its 
clo9ck is up to date with the internet...,




-- 
Future generations will wonder in bemused amazement that the early 
twenty-first century?s developed world went into hysterical panic over a 
globally average temperature increase of a few tenths of a degree, and, 
on the basis of gross exaggerations of highly uncertain computer 
projections combined into implausible chains of inference, proceeded to 
contemplate a rollback of the industrial age.

Richard Lindzen

--- PyGate Linux v1.5
 * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

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