Unless others know your Gmail password, they should not be able to do that. As a precaution, change your password. Also, verify your personal data on that site is correct.

Note: Hackers have found ways to make it look like mails that they send look like they are coming from a different address. Banks, government . . .

Ok...Thanks. I,m curious because I got an email with no subject,and an attachment.The only info was it was sent from Kouplend...whatever that is.I did not open the message,just moved it to spam or some other folder. The address had a hotmail address,but I dont think it is a legit one,but thats the point i stopped at.

I never open anything unless I know where/who it comes from. Note: E-mail attachments are known to contain viruses.