Thank you for taking the time to file a bug report.
This looks more like some local issue and as such is a better
type of question for the Ubuntu community. You can ask for help
at the link below.
Since it seems likely to me that this is a local configuration problem,
rather than a bug in Ubuntu, I am marking this bug as 'Incomplete'.
However, if you believe that this is really a bug in Ubuntu, then we would
be grateful if you would provide a more complete description of the problem
with steps to reproduce, explain why you believe this is a bug in Ubuntu
rather than a problem specific to your system, and then change the bug
status back to "New".
For local configuration issues, you can find assistance here:
** Changed in: exim4 (Ubuntu)
Status: New => Incomplete
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package exim4-base 4.86.2-2ubuntu2.3 failed to install/upgrade:
subprocess installed post-removal script returned error exit status 5
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