Thanks for reporting this
I confirmed that as a bug, and with medium priority as it has a workaround.
** Changed in: exim4 (Ubuntu)
Status: New => Confirmed
** Changed in: exim4 (Ubuntu)
Importance: Undecided => Medium
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** Description changed:
- (solution in the end)
+ ## Bug Summary:
+ Mail send from the localhost to "root" will not follow /etc/aliases in
smarthost config due to "dpkg-reconfigure exim4-config" error.
- ## Setting: exim4 (4.76-3ubuntu3.1) configured as smarthost without local
mail delivery.
