Emailing .zip Files

[sweetpeas]

Hi! I just got my phone. I havent had one in years so this is really new to me. I run a online business and all the files get emailed to them. They pay and then I reply to the payment and attached the zip files and Im done.
I have my pop email set up and I have my files on my sd card but I am unable to path to them when I reply. Any any help is really appreciated!