Date: Thu, 16 Dec 1999 09:58:41 -0500 From: John <papalia@UDel.Edu> To: Martin Welk <mw@theatre.sax.de>, Alfred Perlstein <bright@wintelcom.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: DNS Setup Message-ID: <4.1.19991216092652.009ecb20@mail.udel.edu> In-Reply-To: <19991216060402.B87366@theatre.sax.de> References: <4.1.19991215230917.009e45a0@mail.udel.edu> <4.1.19991215230917.009e45a0@mail.udel.edu>
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Hi again, Thanks for the quick responses. To provide more information the setup, I plugged in some answers below: >> I have sendmail allowed in /etc/hosts.allow. I have mx records in all the >> name databases. I have O'Reilly's sendmail book on order, and it should be >> here tomorrow :) Any other places I should start looking? Does DNS have to >> be expressly permitted in /etc/hosts.allow? This makes no sense since i >> can be pinged and looked up? > >Is sendmail running? Yes, and if I make any configuration changes, I give it a kill -1 just to make sure. >Check, if you can reach sendmail from other hosts by with a telnet session >to your SMTP port (telnet your.hosts.fqdn [smtp|25]) and look if it doesn't >hear for you. I have telnet 'permanently' disabled on this box - don't really trust. it. To run the test though, I enabled it, and was able to telnet in from one of the upstream nameservers (belonging to the university). From there, I successfully ran the short test on pg 467 of The Complete FreeBSD v.2. Seemed to all work ok - the test mail was delivered locally. >Which recipients are test mails addresses to? For example, if you haven't >configured sendmail.cw properly, your host would be foo.bar.tlh, but you >it isn't reachable also as bar.tlh. Locally, I tried sending mail to me@foo.bar and me@machine.foo.bar. Both worked. I had a friend on the west coast try to send mail to both addresses. Both failed. >OTOH, you say you get them back with ``host unknown'' - check for the >name server of the machine your sending from if it can resolve an MX >record for the host/domain part of your recipients address. Did you >wait long enough to let world know of your DNS entries? It's been about 2 weeks now, actually. Since I was just setting things up, I set the expiry at 3 days, and I get warnings that "your SOA expiry is less than 7 days", but it still runs and resolves just fine. >When you can reach the host foo.bar.tlh by IP but cannot direct mail >to it, it has often to do with DNS setup, otherwise your host would >have sent back that mail (what do those headers look like?) I just tried to email directly to me@ip, and this is the error message back: ----- The following addresses had permanent fatal errors ----- <me@insert.my.ip.here> ----- Transcript of session follows ----- 550 <me@insert.my.ip.here>... Host unknown (Name server: insert.my.ip.here: host not found) Something else I found interesting... apparently, while mail delivery was being attempted, I got the following line in /var/log/messages: Dec 16 09:42:31 merlin sshd[60534]: DNS lookup failed for "207.103.119.114". I tried to do an nslookup from both my machine, and the uni's name server, and both failed to do a lookup. That 207.103.x.x is also not part of the university's domain. >How did you specify the MX records in your zone configuration? Did that as explained in O'Reilly's bind & DNS book: machine IN A 1.2.3.4 mail IN CNAME merlin ; mail services ns IN CNAME merlin ; Name service foo.bar. IN MX 10 machine.foo.bar ; mail And well, there's an immediate problem... I forgot the bloomin "." at the end of the machine.foo.bar which is most likely screwing SOMETHIGN up =) Lo and behold, when I go back and reread the error messages on the rejected mail, it references no host name machine.foo.bar.foo.bar. Grrr. :) OK, so that error is fixed, assuming that if I make the last line look like: foo.bar. IN MX 10 machine.foo.bar. ; mail it will be ok? Given that I made that correction on my primary NS, which is the one referenced by internic, do I need to give 3 days (the expiry time) for it to filter thru? Or should somethign like this be "immediate"? To respond to Alfred's point: >you need to add these additional machine names to /etc/sendmail.cw >or /etc/mail/sendmail.cw check /etc/sendmail.cf to figure out which. Hopefully I can do that tonight as soon as I have the sendmail book in hand to read more intelligently. So far I've only been working off various online dox and the online sendmail info. As it stands right now, i have an /etc/sendmail.cw that reads: domain1.com domain2.com domain3.com host.name.that.the.uni.gave.me.months.ago.edu domains 1,2, and 3 are the three that I registered and need to support mail for. I'm assuming (so far) that this is the correct format of the file. Thanks again all!!!! Best, John Papalia To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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