- Whitelisting - This means that any message from a specific IP address or domain name is to be accepted, regardless of the content.
- Greylisting - This means that the IP address or domain name is currently not allowed to be accepted and will be rejected with a "try again later" message status.
- Blacklisting - All emails send from a certain IP address or domain name will be rejected due to past offences.
What is black, grey and whitelisting?
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