Первое спам-сообщение по телеграфу было отмечено в 1864 году. Это была реклама услуг дантиста.
TO THE EDITOR OF THE TIMES
Sir, -- On my arrival home late yesterday evening a "telegram,"
by "London District Telegraph," addressed in full to me, was
put in my hands. It was as follows: --
"Messrs. Gabriel, dentists, 27, Harley-street, Cavendish-square.
Until October Messrs. Gabriel's professional attendance at 27,
Harley-street, will be 10 till 5."
I have never had any dealings with Messrs. Gabriel, and beg to
ask by what right do they disturb me by a telegram which is
evidently simply the medium of advertisement? A word from you
would, I feel sure, put a stop to this intolerable nuisance. I
enclose the telegram, and am,
Your faithful servant,
Upper Grosvenor-street, May 30. M. P.