Do you also hate the proxy server at work? I do. Here's what i did:
At home i'm running a Windows server.
And I created the following batch script:

wget http://pdfmyurl.com?url=http://youranonnews.tumblr.com
mv index*.* anon.pdf
wscript sendmail.vbs
rm -r anon.pdf

As you can see, i'm using a vbs script to send the mail.
The vbs could be:

filist = "c:\location\to\anon.pdf"
Set objEmail = CreateObject("CDO.Message")
objEmail.Subject = "Your Daily Anon News!"
objEmail.Textbody = "Your Daily Anon News!"
objEmail.Configuration.Fields.Item _
("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objEmail.Configuration.Fields.Item _
("http://schemas.microsoft.com/cdo/configuration/smtpserver") = _
And yes, there are some other ways to avoid your proxy. I'll discuss a more neat way to avoid it, later ;-)