Doing a search via regular Gmail frontend in the browser, shows strange results.
I want to search all mails from
shows also emails sent from an ebay subdomain:
It seems like Gmail ignores the "@", otherwise I can't see why those messages appear in the search results.
I also tried following searches with no success:
from:"@ebay" from:'@ebay' from:(@ebay) from:("@ebay") from:('@ebay')