i always see in the postfix maillog the following: dsn=2.6.0,dsn=2.0.0,dsn=4.0.0,
understand this is the status of the delivery; what is the significance of these numbers after dsn?; (e.g. dsn=2.0.0 i understand status sent ok) i googled for it but could not manage to get any info about this; somebody can help me
