[afnog] SMTP server rejecting domain

[Mike Barnard]

>
> Jun  1 13:24:47 nyandeni sendmail[12526]: k51BOegk012526:
> ruleset=check_mail, arg1=<asmwale at cedrisa.org>, relay=[196.45.190.62],
> reject=451 4.1.8 Domain of sender address asmwale at cedrisa.org does not
> resolve


hmmm, it seems like a DNS problem. asking tld1.ultranetdns.net who you are
returns this


# dig @tld1.ultradns.net cedrisa.org any

; <<>> DiG 9.3.1 <<>> @tld1.ultradns.net cedrisa.org any
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60435
;; flags: qr rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;cedrisa.org.                   IN      ANY

;; ANSWER SECTION:
cedrisa.org.            86400   IN      NS      domwe.leland-mw.org.
cedrisa.org.            86400   IN      NS      chambo.sdnp.org.mw.


asking your DNS servers who cedrisa.org is, i get this,

# dig @domwe.leland-mw.org cedrisa.org any

;; ANSWER SECTION:
cedrisa.org.            14400   IN      SOA     nyala.sdnp.org.mw.
paulos.sdnp.org.mw. 2003080611 10800 3600 604800 86400
cedrisa.org.            14400   IN      NS      nyala.sdnp.org.mw.
cedrisa.org.            14400   IN      NS      domwe.leland-mw.org.
cedrisa.org.            14400   IN      A       196.45.188.25
cedrisa.org.            14400   IN      MX      10 domwe.leland-mw.org.
cedrisa.org.            14400   IN      MX      15 kalata1.sdnp.org.mw.
cedrisa.org.            14400   IN      MX      5 zalewa.sdnp.org.mw.

;; ADDITIONAL SECTION:
nyala.sdnp.org.mw.      14400   IN      A       196.45.188.25
zalewa.sdnp.org.mw.     14400   IN      A       196.45.188.10
kalata1.sdnp.org.mw.    14400   IN      A       196.45.188.15


# dig @chambo.sdnp.org.mw. cedrisa.org any

;; ANSWER SECTION:
cedrisa.org.            86400   IN      NS      domwe.leland-mw.org.
cedrisa.org.            86400   IN      NS      chambo.sdnp.org.mw.

;; AUTHORITY SECTION:
cedrisa.org.            86400   IN      NS      chambo.sdnp.org.mw.
cedrisa.org.            86400   IN      NS      domwe.leland-mw.org.

;; ADDITIONAL SECTION:
chambo.sdnp.org.mw.     14400   IN      A       196.45.188.5


asking your DNS servers who handles cedrisa.org mail returns failure from
one and success on the other.

# dig @domwe.leland-mw.org cedrisa.org mx

;; ANSWER SECTION:
cedrisa.org.            14400   IN      MX      10 domwe.leland-mw.org.
cedrisa.org.            14400   IN      MX      15 kalata1.sdnp.org.mw.
cedrisa.org.            14400   IN      MX      5 zalewa.sdnp.org.mw.

;; AUTHORITY SECTION:
cedrisa.org.            14400   IN      NS      domwe.leland-mw.org.
cedrisa.org.            14400   IN      NS      nyala.sdnp.org.mw.

;; ADDITIONAL SECTION:
zalewa.sdnp.org.mw.     14400   IN      A       196.45.188.10
kalata1.sdnp.org.mw.    14400   IN      A       196.45.188.15
nyala.sdnp.org.mw.      14400   IN      A       196.45.188.25


# dig @chambo.sdnp.org.mw. cedrisa.org mx

; <<>> DiG 9.3.1 <<>> @chambo.sdnp.org.mw. cedrisa.org mx
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 35120
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;cedrisa.org.                   IN      MX


i get an smtp session quite well from here

# telnet zalewa.sdnp.org.mw 25
Trying 196.45.188.10...
Connected to zalewa.sdnp.org.mw.
Escape character is '^]'.
220 zalewa.sdnp.org.mw ESMTP Sendmail 8.13.3/8.13.3; Fri, 2 Jun 2006
15:13:04 +0200
helo proxy.one2net.co.ug
250 zalewa.sdnp.org.mw Hello [41.220.14.7], pleased to meet you
mail from:mike at one2net.co.ug
250 2.1.0 mike at one2net.co.ug... Sender ok
rcpt to:asmwale at cedrisa.org
250 2.1.5 asmwale at cedrisa.org... Recipient ok

you need to check your DNS servers. simply adding other DNS server entries
to your resolv.conf will not solve this, but create a web of madness for
you.




Mike Kwatampora


-- 
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You can either enjoy the benefits of your FAITH or suffer the consequences
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