Messages in echo Irishman sent up (1-4)
I believe the answer is:
'messages in echo irishman sent up' is the definition.
I can't tell whether this definition defines the answer.
'echo irishman sent up' is the wordplay.
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'irishman' becomes 'liam' (common Irish name).
'sent up' says the letters should be written backwards.
'liam' written backwards gives 'mail'.
'e'+'mail'='E-MAIL'
Can you help me to learn more?
(Other definitions for e-mail that I've seen before include "Online post" , "Means of communication" , "Modern method of communication via Internet" , "Electronic epistle" , "Electronic message" .)