Hello, I'm concerned about having ETRN wide open. I am not very familiar with ETRN and have no use for it in our environment. It seems harmless, but if most of one's recipient/sender/client/helo/etc. restrictions are in places they won't be seen by someone trying to fiddle maliciously with ETRN, is it better to put something in smtpd_etrn_restrictions? Maybe:
smtpd_etrn_restrictions = permit_mynetworks, reject Or even: smtpd_etrn_restrictions = reject Or does the smtpd_junk_command_limit take care of this concern? Thanks.
