This plugin performs various tests to detect spoof attempts using the From: header name section.
FNS extra chars - fns_extrachars
The closeness when matching the From:addr and From:name.
Default: 50
FNS check level - fns_check
Allows you to adjust the level of checking. By default FromNameSpoof will ignore the TLD when testing if From:addr is spoofed.
Default: 1
FNS ignore headers - fns_ignore_headers
Skip emails that have these headers present.
Default: empty
FNS ignore DKIM - fns_ignore_dkim
Skip emails that have been DKIM signed by specific senders.
Default: empty