I was very surprised that Thunderbird does not offer an option to show the e-mail-adress of the sender in a column in the table (like the columns "From" and "Correspondents"). This new column would be very useful to quickly identify spam/junk e-mails.
This feature can be added with add-ons:
This feature seems very basic and simple and like it should not require an add-on.
If you do a Google search for this feature, then you find many people, who have asked for this feature for many years.