Hi, We have a serious problem getting our Zope Mailhost to work. Our configuration is as follows: ************** * INTERNET * ************** / \ | | V ******************** ******************** * Linux-Firewall * Port 8080 * Zope-Server * * + Gateway * --------------------> * * * IP:192.168.13.85 * * IP:192.168.13.80 * ******************** ******************** /\ /\ \ / Port 25 SMTP Port 25 SMTP \ ********************** / \ * MS Exchange Server * / \----> * IP:192.168.13.100 * <----/ * * ********************** Relay from 192.168.13.80 The Mailhost-Form is filled out as follows: ID: MailHost SMTP Host: 192.168.13.100 (or mail.cadwork.de tried alternatively) SMTP Port: 25 Whenever we try to send mail via Zope we get the error message 'Host not found'. Anybody an idea? Help would be very much appreciated. Thanx Hans