spam
Signal Spam is a non-profit association that allows Internet users to report anything they consider to be spam in their email. Reports are assigned to authorities or professionals who are able to take action against this spam.
Newsletters spam test. Test the Spammyness of your Emails.
rotation and revocation of DKIM keys.
dkim-rotate is a tool for managing DKIM (email antispam) keys in a manner that avoids unnecessarily making emails nonrepudiable.
Broadly, dkim-rotate intends to weaken the non-deniable authenticity of leaked and archived emails, while still retaining DKIM’s antispam function. For more discussion of the problem, and the chosen solution, see dkim-rotate(7), and Matthew Green’s article Ok Google: please publish your DKIM secret keys.
Allows you to purge all reply comments left by a user on a YouTube channel or video. Allows you to filter and search for spammer comments on your channel in many different ways AND delete them all at once (see features below).