いろんなフォントで「mail_slot」変換
Zen Old Minchomail_slot
Yusei Magicmail_slot
M PLUS 1mail_slot
Shippori Antiquemail_slot
Yuji Maimail_slot
Dela Gothic Onemail_slot
DotGothic16mail_slot
Train Onemail_slot
Hira Minchomail_slot
Potta Onemail_slot
Reggae Onemail_slot
Stickmail_slot
Zen Kurenaidomail_slot
Kosugi Marumail_slot
Rampart Onemail_slot
Hachi Maru Popmail_slot
New Tegominmail_slot
RocknRoll Onemail_slot
Kaisei Decolmail_slot
「mail_slot」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
