Am 03.10.2014 um 12:52 schrieb Michel Donais: > O/S: centos 5.11 fresh install and updated this week. > Postfix: most recent yum update this week > > Postfix is set-up to work but do not answer to 'helo'; but sendmail can. > I do not have this situation in 5.4 > > Do somebody can figure out where I'm wrong? Log content and configuration details will be necessary. Alexander