The suggestions are good. Do Postfix and other FOSS email servers implement them? > - Let's keep antispam measures. ... > - Change blacklisting protocols so

The suggestions are good. Do Postfix and other FOSS email servers implement them? > - Let's keep antispam measures. ... > - Change blacklisting protocols so they are not permanent and use an exponential cooldown penalty. ... > - Blacklists should not include whole IP blocks. ... > - Stop blackholing. ... > - There should be a recourse for legitimate servers. ... doing some paperwork or paying a fee to prove I'm legit ...