From: mds@bogus.nodomain.nowhere   
      
   Not limited to Slackware but as a long-time Slackware user, this group   
   seems more like home to me...   
      
   Given sendmail 8.17.1 running as daemon:   
      
        /usr/sbin/sendmail -L sm-mta -bd -q25m   
        /usr/sbin/sendmail -L sm-msp-queue -Ac -q25m   
      
   is there a way to query the daemon to learn what nameserver(s) it is   
   using?   
      
   Why do I ask?   
      
   AFAICT, unlike some other programs which appear to query   
   /etc/rsolv.conf each time they use DNS, sendmail reads   
   /etc/resolv.conf when it starts and stores the IP addresses of   
   nameservers internally.  If /etc/resolv.conf changes, that change is   
   not noted by sendmail.  The result is a prolonged, fruitless attempt   
   to resolve a hostname from nameservers that will no longer respond to   
   the request from the then-current net-facing IP address of localhost.   
      
   Details   
      
   My usual setup is a desktop cabled to a router that is in turn cabled   
   to a gateway device using ISP "A".   
      
   The sendmail daemon's only task is to deliver outgoing mail to a   
   smarthost with TLS and AUTH.   
      
   At times, using wicd, I disconnect from the router and reconnect via   
   wi-fi, using a cell phone served by ISP "B" as an access point.  Wicd   
   replaces /etc/resolv.conf with one that references the nameservers of   
   ISP "B".  Apps such as a web browser and Usenet news proceed as   
   expected after the change but sendmail fails to deliver messages to   
   the remote smarthost.   
      
   Restarting sendmail fixes this.   
      
   It would be convenient to be able to query the sendmail daemon to see   
   what it was using as nameservers and avoid a restart if one isn't   
   needed.   
      
   I have the Bat Book but don't find an answer there.   
      
   A way to do this or enlightenment of ignorance on my part -- things I   
   don't know I don't know :-) -- welcome.   
      
      
   --   
   Mike Spencer                  Nova Scotia, Canada   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)