“我有一加急邮件发至你信箱，请速查阅和回复，急”翻译成英语

I have a urgent mail sent to your mailbox,please inspection and reply rapidly.

我有一加急邮件发至你信箱，请速查阅和回复. I have sent you a letter of which is in urgent, pls check your mailbox and reply soon.

It's urgent! Pls kindly find your mailbox and reply ASAP.

虽然很紧急，不过还是要有礼貌的表述

I have a urgent mail sent to your mailbox,please find it and give us a early reply .

i have sent a urgent mail to your mailbox,please check it up and reply immediately

I send a letter to you ,hope your soonest reply,urgently!