Sure. Have a supersearch around perlmonks for www::mechanize or lwp::useragent, along with login. You need to know perl pretty well to get this to work though. If you are feeling trusting, post the website, username, password, and someone here may do it for fun or the XP.

If you're feeling less trusting, you could post a project to rentacoder, elance, scriptlance, etc you should be able to find someone to do this for you at a low cost without too much effort. Or check out dragonchild's node for perlmonks that are available to contract.

You could also do this without perl using iopus's internet macros. I would go with perl though.

You could also try this with wget. The login is the tricky part, since wget's support for html post requests is not as good as perl's, but this might help, or you might be able to find a better howto by hitting your favorite search engines.

The above applies for loggin in / downloading. For emailing, well, without perl there might be some utility you can call from the batch file, otherwise yes, you could do it with pero.

Good luck.