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#digraph #metagraphy #digram

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#simple mail transfer protocol #email spam #internet assigned numbers authority #spam #sendmail #metagraphy #jon postel #aesthetic #email client #postcard #greek alphabet #phonetic alphabet #electronic mail #mime #domain name system #phishing #arpanet #ascii #botnet #post #smtp #snail mail #world wide web #latin alphabet #dnsbl #european union #webmail #email