How to uninstall or remove claws-mail-pgpcore software package from Debian 9 (Stretch)

You can uninstall or removes an installed claws-mail-pgpcore package itself from Debian 9 (Stretch) through the terminal,

$ sudo apt-get remove claws-mail-pgpcore

Uninstall claws-mail-pgpcore including dependent package

If you would like to remove claws-mail-pgpcore and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove claws-mail-pgpcore

Use Purging claws-mail-pgpcore

If you use with purge options to claws-mail-pgpcore package all the configuration and dependent packages will be removed.

$ sudo apt-get purge claws-mail-pgpcore

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove claws-mail-pgpcore