Immigration Site

Hi, I just Called NVC, they say I got a check list , and they will email me a check list where I need to submit my marriage certificate.

I am e-filling my mom who is in China now.

My question is

1)Since they will email me why still take couple day for computer to generate a email? how long do i have to wait to get a email?

2) after I email my marriage certificate with check list, how long do I have to wait?

Thank You