One of my customer seems to be an open relay for many SMTP servers. I don’t understand why since both important settings in the config are ok. Both fields (Deny messages to be sent to the following external internet domains AND Deny messages from the following internet hosts to be sent to external internet domains) have a * as value. What other setting am I missing???
Something must be making you think that it is an open relay. Are you able to telnet to the SMTP server? If so, try relaying mail off of it. Also, you can see if they are listed as an open relay at, among other sources, dnsstuff.com.
Hello Genevieve, please check if your firewalls work with NAT (Network Adress translation). All settings are whitout effect if Domino-SMTP is behind a Firewall with NAT.HTH