Help Please- Sending an Email From Craigslist? Will Choose Best Answer!?

I am trying to contact a seller. There email is anonymized. When I click on it to email them my computer brings up a Microsoft program to email them from but I am nearly positive it's not sending it. Even though I click "Send" it says it has not been sent. My question is can I copy and paste the anonymized email to my Yahoo! Mail and send it from there even thought it's anonymized? Please help! I will choose best answer!!!