RFC 2045

RFC 2045

[3] 3. MIME Header Fields (MIME 頭欄) → MIME頭欄
[4] 4. MIME-Version: Field
[5] 5. Content-Type: Field
[6] 6. Content-Transfer-Encoding: Field
[7] 7. Content-ID: Field
[8] 8. Content-Description: Field
[9] 9. Additional MIME Header Fields (追加の MIME 頭欄) → MIME頭欄

RFC 2045