What is the Postmaster address used for? When you create a new policy within your account, you are required to enter a postmaster email address. This address is used as the sender address when notifications are issued under that policy. Other than that, it is not used.

Is postmaster email required?

Certified senders must have dedicated postmaster and abuse email addresses for each sending domain and return path domain referenced in email sent over Return Path certified IP addresses. RFC 5321 states that errors during the processing of email should be directed to the postmaster email address.

Why do I get postmaster emails?

Phishing scam. Hi, Over the past few weeks I have received over 300 emails from from postmaster@outlook saying that my emails are undeliverable, alongside diagnostic information that I do not understand. I have not sent these ~300 original messages and I believe that I may be spoofed.