Good news guys, specially all of those who use Gmail, the news is that the maximum attachment size for Gmail has been increased from 20 MB to 25 MB. This is what Google said in this regard:

With Gmail, you can send and receive messages up to 25 megabytes (MB) in size. Please note that you may not be able to send larger attachments to contacts who use other email services with smaller attachment limits. If your attachment bounces, you should invite them to Gmail