On Jul 22, 2007, at 1:48 AM, [EMAIL PROTECTED] wrote:
Jul 20 02:50:23 sonya sendmail[17098]: l6K773ef017008: to=<[EMAIL PROTECTED]>,<[EMAIL PROTECTED]>, ctladdr=<[EMAIL PROTECTED]> (501/501), delay=02:43:00, xdelay=00:00:00, mailer=relay, pri=330573, relay=orngca-mls06.dc.rr.com, dsn=4.0.0, stat=Deferred: Name server: orngca-mls06.dc.rr.com: host name lookup failure {RR DNS still down; can't resolve kernel-panic.org?} Jul 20 03:49:34 sonya sendmail[17103]: l6K773ef017008: to=<[EMAIL PROTECTED]>,<[EMAIL PROTECTED]>, ctladdr=<[EMAIL PROTECTED]> (501/501), delay=03:42:11, xdelay=00:00:06, mailer=relay,pri=420573, relay=orngca-mls06.dc.rr.com. [66.75.160.20], dsn=2.0.0,stat=Sent (l6KBGeIF013120 Message accepted for delivery) {Message finally reaches RR.}
These last two messages are really the significant ones. You're close in your analysis, but not quite spot on. the DNS failure is on your machine, when attempting to look up the next-hop mail server, which happens to be the one provided to you by RR. Very specifically, the first message says "This message is deferred because the name server couldn't find 'orngca-mls06.dc.rr.com'."
The second message you list here is when everything works again.So, there's two possibilities for the problem. One, is that your DNS server is occasionally not working. This doesn't seem very likely, because you'd notice it in a lot of other ways. (Connections to anything would fail or take a long time to succeed due to DNS timeouts or failures).
The other possibility is that the specific server that you've configured your sendmail to relay mail through was temporarily not listed in DNS. This may happen if RR is rotating servers in or out of service, and you're telling sendmail to point to a specific mail server instead of a generic service name (like Cox uses "smtp.west.cox.net".)
How do you have sendmail configured to send outbound mail? Gregory -- Gregory K. Ruiz-Ade <[EMAIL PROTECTED]> OpenPGP Key ID: EAF4844B keyserver: pgpkeys.mit.edu
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