dial-up callback technique

  • 1Anti-spam techniques — To prevent e mail spam (aka unsolicited bulk email), both end users and administrators of e mail systems use various anti spam techniques. Some of these techniques have been embedded in products, services and software to ease the burden on users… …

    Wikipedia

  • 2Anti-spam techniques (e-mail) — To prevent e mail spam, both end users and administrators of e mail systems use various anti spam techniques. Some of these techniques have been embedded in products, services and software to ease the burden on users and administrators. No one… …

    Wikipedia

  • 3Click-to-call — Click to call, also known as click to talk, click to chat and click to text, is a form of Web based communication in which a person clicks an object (e.g., button, image or text) to request an immediate connection with another person in real time …

    Wikipedia