Try using nslookup to check those hosts, Postfix uses DNS heavily. As
Joost says,
try relay_host=your.ISP.SMTP.server
Also post some of the Postfix log with the error messages.
Jeffrey
Quoting Joost van der Lugt
* basslake
[Jun 14. 2001 17:33]: Hi all I have been trying to get mutt to send mail, but the mail keeps ending up in /var/spool/postfix/defer and says that host not found , this is with any hostname I try to send to.
Am I missing something in postfix - procmail - fetchmail -or mutt configs that is needed for sending mails through the postfix system, mail delivery agent ?
Well think I can help you pinpoint a little bit.... postfix.
You probably need something like a SMART_HOST pointing to your ISP's mailserver. I have however no experience setting this up with postfix; a search about this on google should clear things up, or maybe, maybe somebody here...
Joost
-- I don't do Windows and I don't come to work before nine. -- Johnny Paycheck