What is the maximum size file you can send by outlook?
It most likely would depend on what your internet connection can
cope with,
if it is a slow connection, i recommend to stay to smallish
files but if connection is fast, big files should be fine but i
really do not know if there is any limits.
searching the web gives this response:
"No, but it's a good idea to limit your attachments to documents
or files smaller than 1,000 Kilobytes (1MB). Large attachments
increase the size of your email messages and make it more likely
that the message will be rejected or mangled during its voyage to
your recipient."