[IMGate] Fw: Postfix SMTP server: errors from unknown[81.53.135.170]

[M.D. DeWar]

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