Henry R: > Hello list, > > As a receiver MTA (postfix), if DKIM, SPF or DMARC has got failed to the > sender domain, what action postfix will take for this incoming message? > reject or greylist it? > > I have setup the mail system (as this domain openmbox.net) but not sure about > it. thanks.
None. You need to use additional software such as one or multiple milters or policy services. These can be configured according to your requirements.