lee <lee@yagibdah.de> writes: [...] Thanks for the tips. >> SMTP>> EHLO 2xd > That's an invalid helo string. Is a valid one made up of just the full fqdn? And if so, is that not acquired from /etc/hosts? /etc/hosts 127.0.0.1 dv.local.lan dv localhost 10.0.0.9 dv.local.lan dv [...] Is that setup incorrectly or is this even the place I should be looking?