noun
Letax; letter facsimile
Wasei-eigo abbreviation of 'letter fax'. Refers to a service that combines letter mail and fax transmission, offered by Japan Post. Not a general English term.
wasei-eigo (Japanese-coined English), from letter fax
レタックスで書類を送りました。
I sent the documents via Letax.
レタックスは郵便局のサービスです。
Letax is a post office service.