Are you using SmartDNSHost in server.tab?

If so, is SmartDNSHost pointing to the same server that you had issued the command:
dig embarqnow.net MX
?

Regards

Edinilson
------------------------------------------
ATINET
Tel Voz: (0xx11) 4412-0876
http://www.atinet.com.br


----- Original Message ----- From: "U.Mutlu" <um4...@mutluit.com>
To: <xmail@xmailserver.org>
Sent: Friday, October 12, 2012 11:54 AM
Subject: [xmail] Dbg&Fix: Mail loop detected


Just wanted to share a "debug session" to trace down a "Mail loop detected" situation:

A bounce mail with reason "Mail loop detected" is generated under this circumstance:
 if it takes too many steps (operations) to get the first MX record
 (or the final A record when MX is missing after trying all)
 of the recipient domain than what is defined in server.tab under
   "MaxMTAOps"     "16"

For example:
I had a mail to an address xx...@embarqnow.net and got that error
because that domain has many nameservers and a depth of 3 levels
to finally get the MX record, but the number of steps to get to the MX
exceeds the above defined 16 ...


#################################################
# dig  embarqnow.net any

; <<>> DiG 9.8.1-P1 <<>> embarqnow.net any
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41501
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 13, ADDITIONAL: 13

;; QUESTION SECTION:
;embarqnow.net.                 IN      ANY

;; ANSWER SECTION:
embarqnow.net.          39916   IN      A       64.45.201.2

;; AUTHORITY SECTION:
net.                    62167   IN      NS      f.gtld-servers.net.
net.                    62167   IN      NS      d.gtld-servers.net.
net.                    62167   IN      NS      b.gtld-servers.net.
net.                    62167   IN      NS      i.gtld-servers.net.
net.                    62167   IN      NS      g.gtld-servers.net.
net.                    62167   IN      NS      k.gtld-servers.net.
net.                    62167   IN      NS      a.gtld-servers.net.
net.                    62167   IN      NS      e.gtld-servers.net.
net.                    62167   IN      NS      j.gtld-servers.net.
net.                    62167   IN      NS      c.gtld-servers.net.
net.                    62167   IN      NS      l.gtld-servers.net.
net.                    62167   IN      NS      m.gtld-servers.net.
net.                    62167   IN      NS      h.gtld-servers.net.

;; ADDITIONAL SECTION:
a.gtld-servers.net.     22812   IN      A       192.5.6.30
a.gtld-servers.net.     120523  IN      AAAA    2001:503:a83e::2:30
b.gtld-servers.net.     2525    IN      A       192.33.14.30
b.gtld-servers.net.     9837    IN      AAAA    2001:503:231d::2:30
c.gtld-servers.net.     11423   IN      A       192.26.92.30
d.gtld-servers.net.     79977   IN      A       192.31.80.30
e.gtld-servers.net.     119385  IN      A       192.12.94.30
f.gtld-servers.net.     70410   IN      A       192.35.51.30
g.gtld-servers.net.     23788   IN      A       192.42.93.30
h.gtld-servers.net.     23957   IN      A       192.54.112.30
j.gtld-servers.net.     23958   IN      A       192.48.79.30
l.gtld-servers.net.     22980   IN      A       192.41.162.30
m.gtld-servers.net.     25511   IN      A       192.55.83.30

;; Query time: 5 msec
;; WHEN: Fri Oct 12 16:20:56 2012
;; MSG SIZE  rcvd: 500


#################################################
And picking one of the nameservers gives:

# dig @b.gtld-servers.net embarqnow.net any

; <<>> DiG 9.8.1-P1 <<>> @b.gtld-servers.net embarqnow.net any
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7771
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;embarqnow.net.                 IN      ANY

;; AUTHORITY SECTION:
embarqnow.net.          172800  IN      NS      ns1.embarqservices.net.
embarqnow.net.          172800  IN      NS      ns2.embarqservices.net.

;; ADDITIONAL SECTION:
ns1.embarqservices.net. 172800  IN      A       138.210.81.3
ns2.embarqservices.net. 172800  IN      A       64.45.205.2

;; Query time: 97 msec
;; WHEN: Fri Oct 12 16:29:17 2012
;; MSG SIZE  rcvd: 114


#################################################
And continuing:

# dig @ns1.embarqservices.net embarqnow.net any

; <<>> DiG 9.8.1-P1 <<>> @ns1.embarqservices.net embarqnow.net any
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61425
;; flags: qr aa rd; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 3
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;embarqnow.net.                 IN      ANY

;; ANSWER SECTION:
embarqnow.net. 86400 IN SOA ns1.embarqservices.net. dns-admin.embarqservices.net. 2011070100 10800 3600 604800 86400
embarqnow.net.          86400   IN      NS      ns2.embarqservices.net.
embarqnow.net.          86400   IN      NS      ns1.embarqservices.net.
embarqnow.net. 86400 IN MX 10 localhost.embarqnow.net.
embarqnow.net.          86400   IN      A       64.45.201.2

;; ADDITIONAL SECTION:
ns1.embarqservices.net. 10800   IN      A       138.210.81.3
ns2.embarqservices.net. 10800   IN      A       64.45.205.2
localhost.embarqnow.net. 86400  IN      A       127.0.0.1

;; Query time: 130 msec
;; WHEN: Fri Oct 12 16:30:11 2012
;; MSG SIZE  rcvd: 218

#################################################

The solution in this case would be to increase the above said limit in server.tab.

OTOH the following command finds it immediately:


# dig embarqnow.net MX

; <<>> DiG 9.8.1-P1 <<>> embarqnow.net MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10491
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 13, ADDITIONAL: 13

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

;; ANSWER SECTION:
embarqnow.net. 43200 IN MX 10 localhost.embarqnow.net.

;; AUTHORITY SECTION:
net.                    60442   IN      NS      d.gtld-servers.net.
net.                    60442   IN      NS      j.gtld-servers.net.
net.                    60442   IN      NS      i.gtld-servers.net.
net.                    60442   IN      NS      c.gtld-servers.net.
net.                    60442   IN      NS      l.gtld-servers.net.
net.                    60442   IN      NS      m.gtld-servers.net.
net.                    60442   IN      NS      b.gtld-servers.net.
net.                    60442   IN      NS      e.gtld-servers.net.
net.                    60442   IN      NS      g.gtld-servers.net.
net.                    60442   IN      NS      a.gtld-servers.net.
net.                    60442   IN      NS      f.gtld-servers.net.
net.                    60442   IN      NS      k.gtld-servers.net.
net.                    60442   IN      NS      h.gtld-servers.net.

;; ADDITIONAL SECTION:
localhost.embarqnow.net. 38196  IN      A       127.0.0.1
a.gtld-servers.net.     21087   IN      A       192.5.6.30
a.gtld-servers.net.     118798  IN      AAAA    2001:503:a83e::2:30
b.gtld-servers.net.     800     IN      A       192.33.14.30
b.gtld-servers.net.     8112    IN      AAAA    2001:503:231d::2:30
c.gtld-servers.net.     9698    IN      A       192.26.92.30
d.gtld-servers.net.     78252   IN      A       192.31.80.30
e.gtld-servers.net.     117660  IN      A       192.12.94.30
f.gtld-servers.net.     68685   IN      A       192.35.51.30
g.gtld-servers.net.     22063   IN      A       192.42.93.30
h.gtld-servers.net.     22232   IN      A       192.54.112.30
j.gtld-servers.net.     22233   IN      A       192.48.79.30
l.gtld-servers.net.     21255   IN      A       192.41.162.30

;; Query time: 399 msec
;; WHEN: Fri Oct 12 16:49:41 2012
;; MSG SIZE  rcvd: 510

#################################################
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