[SLUG] Sendmail, dns & resolv.conf

[The Mystical Ninja]

Hello. I have a RedHat 7.0 box on a clients site handling their mail. The site uses outside DNS servers for resolving and while the network is connected to the Internet everything is fine. However, when the connection drops, we obviously can't send outside mail but we also cannot send internal email without a long wait. To send a email from [EMAIL PROTECTED] to [EMAIL PROTECTED] takes upto 2 minutes even though the mail server recieves mail for company.com.au. Why does sendmail insist on doing a DNS lookup on company.com.au when it set to recieve mail for that domain, and is there any setting I am missing? I'd rather not have to setup a DNS server on the mail server. The wierd thing is if the Internet connection has dropped I can rm resolv.conf so sendmail has no name servers to check, and mail seems to go through fine.