You mean you were logging in with your workplace computer?
That was so stooooopid.
Almost every office network server now having software to monitoring the staff computers linked to the server. The software is tracking what you are doing on the computer including websites and emails you have accessed or sending and receiving. Some software can also be retaining passwords.
If your boss or HR is unscrupulous, they can accessing your email accounts with your password. I am not computer master hor. All this I am learning at the RWS in-house employee training session. :p