pyspf(1) on Linux
The text ec5c3e9a8314, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
pure-Python SPF library
The text ec5c3e9a8314, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
pure-Python SPF library