Since most domains have a postmaster address, it is commonly targeted by spamming operations. Even if not directly spammed, a postmaster address may be sent bounced spam from other servers that mistakenly trust fake return-paths

It means that your email address has been harvested by hackers. These hackers use your email address as the « reply to » and send out spam, bulk emails and junk email. When the email address they

You can use Postmaster Tools to track data on large volumes of emails sent and find data about your sending domain. You can view different dashboards to understand details like Gmail delivery errors, spam reports,