Been using Gmail for years now. I'm happy with it. Does a great job of keeping spam out of my inbox. 
Windows Mail was one of applications removed from Windows 7 and replaced by Windows Live Essentials suite, which could be downloaded separately. You can find out more information at List of features removed in Windows 7 - Wikipedia, the free encyclopediaWhen Win7 shipped without a mail program, I went to Gmail & never looked back.!
I tried many times to the SUD through Gmail, even with the password it blocks the sample! I thought I was doing it wrong, when the outlook to send smoothlyGmail for day-to-day. Outlook for submitting malware samples. Gmail blocks all malware submissions, even compressed and password-protected (not sure how it knows).