qmail cannot receive messages from another mailserver

can you post the output of qmail-showctl output

qmail-showctl  output is:
 (domain name is replaced to mydomain.com ,sorry)

[root@ps2 ~]# /var/qmail/bin/qmail-showctl
qmail home directory: /var/qmail.
user-ext delimiter: -.
paternalism (in decimal): 2.
silent concurrency limit: 509.
subdirectory split: 23.
user ids: 7790, 7791, 7792, 0, 7793, 7794, 7795, 7796.
group ids: 2107, 2108.

badhelo: (Default.) Any HELO host name is allowed.

badmailfrom:
.*\ @.* MAIL FROM denied if it matches this pattern.
!.*@.*\..* MAIL FROM denied if it matches this pattern.
.*%.* MAIL FROM denied if it matches this pattern.

badmailfromnorelay: (Default.) Any MAIL FROM is allowed.

badmailto:
[\(\)] RCPT TO denied if it matches this pattern.
[\{\}] RCPT TO denied if it matches this pattern.
@.*@ RCPT TO denied if it matches this pattern.
[\%] RCPT TO denied if it matches this pattern.
[\!] RCPT TO denied if it matches this pattern.

badmailtonorelay: (Default.) No RCPT TO are specifically denied.

badloadertypes:

badloadertypes.cdb: Modified recently enough; hopefully up to date.

badmimetypes:

badmimetypes.cdb: Modified recently enough; hopefully up to date.

bouncefrom: (Default.) Bounce user name is MAILER-DAEMON.

bouncehost: (Default.) Bounce host name is ps2.mydomain.com.

concurrencylocal: (Default.) Local concurrency is 10.

concurrencyremote: Remote concurrency is 60.

databytes: SMTP DATA limit is 104857600 bytes.

defaultdomain: Default domain name is mydomain.com.

defaulthost: Default host name is mydomain.com.

doublebouncehost: (Default.) 2B recipient host: ps2.mydomain.com.

doublebounceto: (Default.) 2B recipient user: postmaster.

envnoathost: (Default.) Presumed domain name is ps2.mydomain.com.

helohost: (Default.) SMTP client HELO host name is ps2.mydomain.com.

idhost: (Default.) Message-ID host name is ps2.mydomain.com.

localiphost: (Default.) Local IP address becomes ps2.mydomain.com.

locals:
Messages for localhost are delivered locally.

me: My name is ps2.mydomain.com.

percenthack: (Default.) The percent hack is not allowed.

plusdomain: Plus domain name is mydomain.com.

qmqpservers: (Default.) No QMQP servers.

queuelifetime: Message lifetime in the queue is 86400 seconds.

rcpthosts:
SMTP clients may send messages to recipients at mydomain.com.
SMTP clients may send messages to recipients at .mydomain.com.

morercpthosts: (Default.) No effect.

morercpthosts.cdb: (Default.) No effect.

smtpgreeting: SMTP greeting: 220 ps2.mydomain.com - Welcome to Qmail Toaster Ver. 1                                                                                                              .3 SMTP Server.

smtproutes:
SMTP route: :ps.mydomain.com

srs_domain: (Default.) SRS domain name is .

srs_secrets: (Default.) No secrets

srs_maxage: (Default.) SRS maxage is 21.

srs_hashlength: (Default.) SRS hashlength is 4.

srs_hashmin: (Default.) SRS hashmin is 4.

spfbehavior: The SPF behavior is 0.

spfexp: (Default.) The SPF default explanation is: 550 See http://spf.pobox.com/                                                                                                              why.html?sender=%{S}&ip=%{I}&receiver=%{xR}.

spfguess: (Default.) The guess SPF rules are: .

spfrules: (Default.) The local SPF rules are: .

timeoutconnect: (Default.) SMTP client connection timeout is 60 seconds.

timeoutremote: (Default.) SMTP client data timeout is 1200 seconds.

timeoutsmtpd: (Default.) SMTP server data timeout is 1200 seconds.

virtualdomains:
Virtual domain: mydomain.com:mydomain.com

clientcert.pem: I have no idea what this file does.

tlsclientciphers: I have no idea what this file does.

domainkeys: I have no idea what this file does.

logcount: I have no idea what this file does.

defaultdelivery: I have no idea what this file does.

concurrencyincoming: I have no idea what this file does.

locals.lock: I have no idea what this file does.

simversions.cdb: I have no idea what this file does.

tlsserverciphers: I have no idea what this file does.

simcontrol.cdb: I have no idea what this file does.

dh512.pem: I have no idea what this file does.

xxxlocals: I have no idea what this file does.

blacklists: I have no idea what this file does.

logsize: I have no idea what this file does.

policy: I have no idea what this file does.

simcontrol: I have no idea what this file does.

dh1024.pem: I have no idea what this file does.

virtualdomains.lock: I have no idea what this file does.

servercert.pem: I have no idea what this file does.

rsa512.pem: I have no idea what this file does.

rcpthosts.lock: I have no idea what this file does.
[root@ps2 ~]#

Just to clarify,  you can send mail internally and externally.  You can not receive email from external.

Internal  send   : OK
Internal receice : OK
External send    : OK
External receive : NG
  (Deferred: Connection reset by [server'sIP ADDR])

But from Client PC, smtp connection using telnet
 seems OK

telnet ps2.mydomain.com smtp

220 ps2.mydomain.com - Welcome to Qmail Toaster Ver. 1.3 SMTP Server ESMTP
mail from:<tansiwo@hotmail.com>
250 ok
rcpt to:<tansiwo@mydomain.com>
250 ok
data
354 go ahead
Subject:test
test
.
250 ok 1359771934 qp 606


Thanks,

Try to telnet from external by name not ip

Also post the full deferred message you get.  You can replace with mydomain I just need to see the complete error

I configure  mail relay from ps.mydomain.com (sendmail) to ps2.mydomain.com (qmail) .

ps(sendmail)'s /etc/mail/mailertable
  mydomain.com smtp:[113.160.130.162]


ps(sendmail)'s /var/log/messages
 Feb  2 11:42:47 dns1 sendmail[6310]: r1147k9S010687: to=<thuybd@mydomain.com>, delay=22:35:00, xdelay=00:00:00, mailer=smtp, pri=9504596, relay=[113.160.130.162], dsn=4.0.0, stat=Deferred: Connection reset by [113.160.130.162]


ps2(qmail)'s /var/log/maillog
  no smtp logs from ps.mydomain.com ,only internal


ps2(qmail)'s /var/log/qmail/smtp
  no smtp logs from ps.mydomain.com ,only internal


 What should I check another log file?

I tried telnet from external  ,using IP and name.

Same response:
  220 ps2.mydomain.com - Welcome to Qmail Toaster Ver. 1.3 SMTP Server ESMTP

Deffered queue  sample is:

[root@dns1 mqueue]# cat qfr0VGnaEI029753
V8
T1359650976
K1359776592
N123
P11111453
I8/2/916038
MDeferred: Connection reset by [113.160.130.162]
Fwbs
$_outmail024.snc7.facebook.com [69.171.232.158]
$rESMTP
$smx-out.facebook.com
${daemon_flags}
${if_addr}210.198.92.225
S<notification+zj4o=06jasjc@facebookmail.com>
MDeferred: Connection reset by [113.160.130.162]
rRFC822; tuyenvt@mydomain.com
RPFD:<tuyenvt@mydomain.com>
H?P?Return-Path: <“>


Thanks,

Tansiwo,
     Hope you had a good weekend, sorry i was not able to continue.

I am ensuring that i have all information correct

1. you have your qmail set to relay (forward) messages to your sendmail server
2. you can send mail out
3. youcan send and receive messages internally

do all your users connect to the qmail or send mail server?
for incomming mail does it all go to the qmail server first then to sendmail?

Thank you for your patience
-=Richard

Edward,

 |'m sorry ,  I re-installed the mail server  last weekend.
  It works fine at the new server.


>1. you have your qmail set to relay (forward) messages to your sendmail server
   yes
>2. you can send mail out
   yes
>3. youcan send and receive messages internally
   yes


I managed two servers, JP (sendmail) , VietNam(qmail).

In VietNam , Internet provider  doesn't provide reserve-DNS ,
  so I configure  all incoming/outgoing messages   first receive JP sendmailserver , next relay to VN  qmail  server , vice versa.

All VN users connect smtp/pops to VN qmailserver , not access JP sendmail server directly.

 
To read logs  closely ,  I found  some  messages can relay (under 5%)
It seems
I doubt concurrencyremote and concurrencyincoming ,   but it seems no problem  on qmail-showctl response.

I give up repair this server ,because of  no time.
I'm so sorry.

Thank you very much for your help.