Date: Sat, 2 Nov 2002 19:20:06 -0500 From: "Charles Swiger" <cswiger@mac.com> To: <freebsd-isp@FreeBSD.ORG> Cc: <jeremy@cableaz.com> Subject: Re: Sendmail/DNS Error Message-ID: <00f001c282ce$c38a74a0$0301a8c0@prime> References: <157240-220021162215518870@M2W042.mail2web.com>
next in thread | previous in thread | raw e-mail | index | archive | help
jeremy@cableaz.com wrote: > One of my mail servers is reporting some weird stuff. It appears to be > unable to resolve hostnames but in reality it is...?? [ ... ] > "Deferred: Name server: mx1.hotmail.com.: host name lookup failure" Transient DNS problems happen every once in a while. Does the mail go through in subsequent queue runs, or does it stay queued? Also, you aren't blocking port 53/tcp on a firewall, by any chance? If so, don't-- you're blocking DNS lookups for domains with a lot of MX's. Having a lot of records causes a DNS reply to come back via TCP and not UDP.... -Chuck To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?00f001c282ce$c38a74a0$0301a8c0>