find /home/*/public_html/ -type f -mtime -1 ! -path "/home/*/*/image/cache/*" ! -path "/home/*/*/vqmod/vqcache/*" ! -path "/home/cpeasyapache/*" | mail -s "modified files"

If you’d like each file emailed, edit the mail to:

find /home/*/public_html/ -type f -mtime -1 ! -path "/home/*/*/image/cache/*" ! -path "/home/*/*/vqmod/vqcache/*" ! -path "/home/cpeasyapache/*" | \xargs -n 1 -I % sh -c 'mail -s "modified files - %" < %'