Verified answer

as long as that is the email address, it will send.

does not matter where you are.

You will simply need to make sure you have the full email address. Some Yahoo! addresses don't end in "@yahoo.com" - instead, with something like "@yahoo.co.uk" or "@yahoo.co.ph" depending on the country. If you have the full, correct email address, you can email them from anywhere.

Then do it...?