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imar815@escuelamercantil.com: host aspmx.l.google.com[2607:f8b0:400e:c0a::1b] said: 550-5.7.1 La cuenta de correo electrónico @escuelamercantil.com es para uso 550 5.7.1 exclusivo dentro de la Escuela Mercantil. - gcdp s21-20020a639255000000b005cfda2f9e48si871610pgn.860 - gsmtp (in reply to end of DATA command)