HELP: sendmail will not get right ip, hostname not found! cache?

Henry Tang

13 Sep 2006 13 Sep '06

13:35

Hello all, I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found.. IS there a cache for sendmail, if so how do i clear it. I rebooted my mail server, run nscd, and nothing helps with caching.. any idea why this is happening thanks henry

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Jerry Feldman

13 Sep 13 Sep

13:52

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

...

Hello all,

I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found.. IS there a cache for sendmail, if so how do i clear it. There are a couple of things. One is that in their MX record, they have a

On Wednesday 13 September 2006 9:35 am, Henry Tang wrote: priority of 0: ;; ANSWER SECTION: vginc.net. 14400 IN MX 0 vginc.net. I don't think your problem is a cache problem since it appears that they have not changed their DNS records in over 1 year. -- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

Carlos E. R.

14:24

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Wednesday 2006-09-13 at 08:35 -0500, Henry Tang wrote:

...

I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found..

The usual cause for this is they not having an MX entry for the domain, but they do have one: cer@nimrodel:~> host vginc.net vginc.net has address 69.93.189.34 vginc.net mail is handled by 0 vginc.net. However, that zero... i don't know if sendmail is coughing because of that, could be. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFFCBSltTMYHG2NR9URAo4iAKCOlT1aPLm8VkUq3vQcTX+c0EExvQCeIkqh gh3mBWwj3pRFFntL/k0x1mE= =B6zp -----END PGP SIGNATURE-----

Jerry Feldman

14:39

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

On Wednesday 13 September 2006 10:24 am, Carlos E. R. wrote:

...

The Wednesday 2006-09-13 at 08:35 -0500, Henry Tang wrote:

...
I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found..

The usual cause for this is they not having an MX entry for the domain, but they do have one:

cer@nimrodel:~> host vginc.net vginc.net has address 69.93.189.34 vginc.net mail is handled by 0 vginc.net.

However, that zero... i don't know if sendmail is coughing because of that, could be.

It certainly could be the 0 (which is the priority), but their MX and A records appear to be correct. -- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

Jan Engelhardt

14:44

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

...

...
...
I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found..

The usual cause for this is they not having an MX entry for the domain,

If you do not have an MX entry, the A entry is picked.

...

...
but they do have one:

cer@nimrodel:~> host vginc.net vginc.net has address 69.93.189.34 vginc.net mail is handled by 0 vginc.net.

However, that zero... i don't know if sendmail is coughing because of that, could be.

It certainly could be the 0 (which is the priority), but their MX and A records appear to be correct.

But 0 is valid. Jan Engelhardt --

Jerry Feldman

15:03

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

On Wednesday 13 September 2006 10:43 am, Jan Engelhardt wrote:

...

...
...
...
I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found..

The usual cause for this is they not having an MX entry for the domain,

If you do not have an MX entry, the A entry is picked.

...
...
but they do have one:

cer@nimrodel:~> host vginc.net vginc.net has address 69.93.189.34 vginc.net mail is handled by 0 vginc.net.

However, that zero... i don't know if sendmail is coughing because of that, could be.

It certainly could be the 0 (which is the priority), but their MX and A records appear to be correct.

But 0 is valid. Essentially, that is what I said. But, it could be a problem with sendmail. -- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

Henry Tang

15:29

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

This is very strange. I even put vginc.net into my host file to point to 69.93.189.34 and it still doesn't work. Is it sendmail? :( I also have another mail server (this one) that i use personally and that works fine. henry Jerry Feldman wrote:

...

On Wednesday 13 September 2006 10:43 am, Jan Engelhardt wrote:

...
...
...
...
I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found..

The usual cause for this is they not having an MX entry for the domain,

If you do not have an MX entry, the A entry is picked.

...
...
but they do have one:

cer@nimrodel:~> host vginc.net vginc.net has address 69.93.189.34 vginc.net mail is handled by 0 vginc.net.

However, that zero... i don't know if sendmail is coughing because of that, could be.

It certainly could be the 0 (which is the priority), but their MX and A records appear to be correct.

But 0 is valid.

Essentially, that is what I said. But, it could be a problem with sendmail.

Henry Tang

16:06

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

Hello all, I looked closely to my dig mx vginc.net i am getting this below. If you noticed it is missing ip.. Below is exactly what i am seeing for output. .I compare to my other server and it is authority section and answer section but is is using dig version 9.2.4. I guess i am not getting the rest because status = servfail henry ; <<>> DiG 9.2.5 <<>> vginc.net mx ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 4158 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;vginc.net. IN MX ;; Query time: 215 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Wed Sep 13 10:53:55 2006 ;; MSG SIZE rcvd: 27 Henry Tang wrote:

...

This is very strange. I even put vginc.net into my host file to point to 69.93.189.34 and it still doesn't work. Is it sendmail? :( I also have another mail server (this one) that i use personally and that works fine.

henry

Jerry Feldman wrote:

...
On Wednesday 13 September 2006 10:43 am, Jan Engelhardt wrote:

...
...
...
...
I am trying to send mail to someone@vginc.net and sendmail kept on saying hostname not found. I dig, host, and nslookup on the domain and all gave the proper info. When sending the email, sendmail reports that vginc.net hostname not found..

The usual cause for this is they not having an MX entry for the domain,

If you do not have an MX entry, the A entry is picked.

...
...
but they do have one:

cer@nimrodel:~> host vginc.net vginc.net has address 69.93.189.34 vginc.net mail is handled by 0 vginc.net.

However, that zero... i don't know if sendmail is coughing because of that, could be.

It certainly could be the 0 (which is the priority), but their MX and A records appear to be correct.

But 0 is valid.

Essentially, that is what I said. But, it could be a problem with sendmail.

Jan Engelhardt

16:39

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

...

Hello all,

I looked closely to my dig mx vginc.net i am getting this below. If you noticed it is missing ip..

IN MX usually takes a hostname.

...

Below is exactly what i am seeing for output. .I compare to my other server and it is authority section and answer section but is is using dig version 9.2.4. I guess i am not getting the rest because status = servfail

; <<>> DiG 9.2.5 <<>> vginc.net mx ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 4158 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

; ; QUESTION SECTION: ; vginc.net. IN MX

;; Query time: 215 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Wed Sep 13 10:53:55 2006 ;; MSG SIZE rcvd: 27

Henry Tang wrote:

...
This is very strange. I even put vginc.net into my host file to point to 69.93.189.34 and it still doesn't work. Is it sendmail? :( I also have another mail server (this one) that i use personally and that works fine.

henry

Jerry Feldman wrote:

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On Wednesday 13 September 2006 10:43 am, Jan Engelhardt wrote:

...
...
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> I am trying to send mail to someone@vginc.net and > sendmail kept on > saying hostname not found. I dig, host, and nslookup > on the domain > and all gave the proper info. When sending the email, > sendmail > reports that vginc.net hostname not found.. > The usual cause for this is they not having an MX entry for the domain,

If you do not have an MX entry, the A entry is picked.

...
...
but they do have one:

cer@nimrodel:~> host vginc.net

Also try to query the superservers directly, i.e. $ dig @a.root-servers.net vginc.net net. 172800 IN NS A.GTLD-SERVERS.net. $ dig @a.gtld-servers.net vginc.net vginc.net. 172800 IN NS ns1.aophoenix.com. ns1.aophoenix.com. 172800 IN A 69.93.189.34 $ dig @ns1.aophoenix.com vginc.net vginc.net. 14400 IN A 69.93.189.34 vginc.net. 14400 IN NS ns1.servermatrix.com. No MX? Oh, BTW: 18:38 ichi:~ > host vginc.net vginc.net has address 69.93.189.34 Host vginc.net not found: 2(SERVFAIL) Host vginc.net not found: 2(SERVFAIL) So it's not really sendmail at fault. Jan Engelhardt --

Jerry Feldman

18:29

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

On Wednesday 13 September 2006 12:05 pm, Henry Tang wrote:

...

Hello all,

I looked closely to my dig mx vginc.net i am getting this below. If you noticed it is missing ip.. Below is exactly what i am seeing for output. .I compare to my other server and it is authority section and answer section but is is using dig version 9.2.4. I guess i am not getting the rest because status = servfail

henry

; <<>> DiG 9.2.5 <<>> vginc.net mx ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 4158 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION: ;vginc.net. IN MX

;; Query time: 215 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Wed Sep 13 10:53:55 2006 ;; MSG SIZE rcvd: 27 I think the problem is on your system. Your system is looking at localhost, and if you are not running a bind server or if your bind server is misconfigured, that could be the problem. What's in your /etc/resolv.conf.

-- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

Carlos E. R.

18:04

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Wednesday 2006-09-13 at 10:29 -0500, Henry Tang wrote:

...

This is very strange. I even put vginc.net into my host file to point to 69.93.189.34 and it still doesn't work. Is it sendmail? :( I also have another mail server (this one) that i use personally and that works fine.

When I experimented with sendmail in an intranet some years ago, it wouldn't work with the hosts file. It didn't work till I created a dns config with mx records. - -- Cheers, Carlos E. R. k -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFFCEg/tTMYHG2NR9URAqbDAJ0blFwUE4cXgvkkZ0Ou71nTPIkNuwCfbcdv Xw+GqiTBk+ZyhAJSzfKZxeQ= =ijgW -----END PGP SIGNATURE-----

Carlos E. R.

18:03

New subject: [SLE] HELP: sendmail will not get right ip, hostname not found! cache?

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Wednesday 2006-09-13 at 16:43 +0200, Jan Engelhardt wrote:

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If you do not have an MX entry, the A entry is picked.

I have seen mail servers complaining of "domain not found" when there was no MX entry. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFFCEfQtTMYHG2NR9URArSeAJ9/KWMr/4XVHUV5cJ5iCs8PhWJt2QCgkR/c gcLMqEhItD6rCUu6ss5uk4E= =bxwX -----END PGP SIGNATURE-----

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Carlos E. R.
Henry Tang
Jan Engelhardt
Jerry Feldman