How to unable the feature to verify documents verified or not if in the mail mentioned "Please go through the attached documents"?

Question

Personally, I faced an only one issue many times while sending a mail. I am human, so chance of facing this issue by others also due to rush lifestyles. I am a lazy person, I checks the mail after sent whether I attached documents or not, oops I ruined it again without attaching required Documents. 

So How I can overcome it? Microsoft Outlook can add the feature. please follow below lines...
The algorithm for the feature : Cross verifies the documents attached or not when sender clicks SEND button. If not attached, activate the alert and disable the SEND button. 
     > To do this check whether the ATTACH word mentioned in the body. Ex: Please go through the attached documents below. 
     > if mentioned the word attach, the algorithm must check the ATTACH action button whether it having input or not. 
> And then activate the alert and disable the SEND button untill documents attached.

Answer 1

This is a great suggestion