I have my university email account set up in Gmail to send and receive. Previously, I created a filter that would move all messages to email@example.com to the firstname.lastname@example.org label. I have since deleted that filter and changed the name of the label email@example.com to Bar, but messages that are sent to firstname.lastname@example.org are still being labeled as Bar. What is causing this?
Make sure you haven't told Gmail to automatically add a label on POP3 import:
To check go to:
Make sure the "Label incoming messages" checkbox is unchecked.