DoYouBuzz recommends you to add, at the end of your emails, a HTML signaturere with a link to your CV. It's an easy and unintrusive way to spread your CV to your contacts.
This feature has been removed from DoYouBuzz, since you can use other online tools to do the same thing, with more flexibility. Just type "email signature generator" in DuckDuckGo to find them.
Here is an example : https://www.mail-signatures.com/signature-generator/