Install libdkim1d-dbg by entering the following commands in the terminal:
sudo apt update sudo apt install libdkim1d-dbg
Description:
DomainKeys Identified Mail (DKIM) library - debug symbols
This package contains the debug symbols for libdkim1d, a library for server-level signing of email using the DKIM standard, and verification of the signatures. See the description of that package for more information.
Homepage: http://libdkim.sourceforge.net
Version: 1:1.0.21-4build1
Section: universe/debug