You can use google drive krisschu9, its safe and free.
Download the newsletter file to your computer. Open google drive and click on My Drive (top center). Then click upload files. You should then be able to see everything on your hard drive under downloads. Find the newsletter file and highlight it by clicking on it. Once highlighted, click open.
Once it is uploaded, click on the 'get shareable link' - it is located to the right of 'your drive' at the top. You will then be given a google drive link. Under that, click share settings. You will see another google drive link. Copy and paste that link in the thread and you are finished.
I normally copy and paste the link in another window to verify its working correctly but you don't have to.
Link for more info
