I am getting the following message in my syslog exactly every 30 seconds. 
Everything is working but words like "Fatal" and "Input/output error" cause me 
an inordinate amount of angst.


postfix/postqueue[<procid>]: fatal: output write error: Input/output error

Searching logs I can find nothing that points to why this is happening. I found 
a post from 18 years ago where someone says that it could be ignored but that 
was 18 years ago and pretty much nothing on the topic since.


If this is a known issue, fine. If not, what is the best way to determine what 
is causing it?

Hardware is a ESXi 7.0 Ubuntu 22.04 Postfix 3.6.4

All current as of the writing of this note.



--

Paul Lemmons
Lead Systems Engineer – Systems and Databases
Tucson Medical Center Healthcare | Information Services
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