>are these mostly spamming ways to use the helo ? > > > In: HELO ARennes-204-1-7-170.w81-53.abo.wanadoo.fr > > Out: 554 <ARennes-204-1-7-170.w81-53.abo.wanadoo.fr>: Helo command >rejected: > > ACL helo_hostnames_regexp HELO/EHLO hostname must not contain an IP > > address, HELO = arennes-204-1-7-170.w81-53.abo.wanadoo.fr
abo = abonnne (French for subscriber). It appears that a lot of dhcp servers pass out the helo hostname along with IP address. That helo hostname is really the PTR hostame doing double duty. Len
