Install bbdb by entering the following commands in the terminal:
sudo apt update sudo apt install bbdb
Description:
The Insidious Big Brother Database (email rolodex) for Emacs
BBDB is a rolodex-like database program for GNU Emacs. BBDB stands for Insidious Big Brother Database, and is not, repeat, *not* an obscure reference to the Buck Rogers TV series.
Homepage: http://bbdb.sourceforge.net/
Version: 2.36-4.1
Section: mail