I have lahore.yi.org as my dynamic hostname 1. But my friends say they cannot connect to my box still. Is this because their ISPs maintain their DNS caches for a longer time? Should I ask my friends to put a.root-servers.net 's IP address in their DNS server setting in Windows? :PPPPPP 2. If I ask yi.org to maintain primary MX record for me, I cannot send mails out. I am running sendmail with my ISP's sendmail as the relay. The mail would loop back with an error from my ISP's sendmail. Why? 3. If I remove my primary MX record from yi.org DNS server and add a secondary MX record to e.g. brain.brain.net.pk, my sendmail works ok but would not relay mails to my ISP's sendmail, instead starts connecting to brain.brain.net.pk Why? Mail relay is not working if MX is present. Of course /etc/hosts is like 127.0.0.1 localhost 209.58.78.55 lahore.yi.org lahore where I replace 0.0.0.0 with my current IP address through /etc/ppp/ip-up -Bilal -------------------------------------------------------------------- The Linux India Mailing List Archives are now available. Please search the archive at http://lists.linux-india.org/ before posting your question to avoid repetition and save bandwidth.