YOU SAID:
Don't get caught with your beard in the letter box.
INTO JAPANESE
郵便受けにヒゲが引っかからないように。
BACK INTO ENGLISH
Don't let your beard get caught in your mailbox.
INTO JAPANESE
あごひげがメールボックスに引っかからないようにしてください。
BACK INTO ENGLISH
Don't let your beard get caught in your mailbox.
That didn't even make that much sense in English.