Heard of it ? If you said/thought no then your no alone. Its part of dkim (my blog) and if you have no idea what that is like yahoo then do not worry about it.
I have dkim, so adsp should not be hard. its not but testing it is.
Amavis (my blog) validates it but the only adsp test i find was on rbl list. The IEEE wondered also why the fuck nobody else had heard of it but then they did not want to know more without paying.
Lets face it the ieee is not something we all admire and its a bit secretive.
I am none the wiser but we really dont want to err ‘use’ adsp do we after all its a secret.
I hear ieee black helicopters coming – you did not read this.