Can't send mail to special domain

[TonyTran]

Dear,

I have some problem when send mail.
I can't send mail to special domain (phongvietco.com), it's my client. Another domain is ok.
My domain is khanhlinhco.com.vn, when i send mail to phongvietco.com, it's error:

​

It was not possible to send this Email,
Check the Address and Try again.

And here is logs:

​

[root@server ~]# tail -n 5 /var/log/maillog
Apr 14 22:48:51 server dovecot[12793]: POP3([email protected]): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Apr 14 22:48:55 server dovecot[12793]: auth(default): shadow([email protected],127.0.0.1): unknown user
Apr 14 22:48:55 server dovecot[12793]: auth(default): passwd([email protected],127.0.0.1): unknown user
Apr 14 22:48:55 server dovecot[12793]: pop3-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured
Apr 14 22:48:55 server dovecot[12793]: POP3([email protected]): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0


[root@server ~]# tail /var/log/exim/mainlog
2010-04-14 22:49:03 H=localhost (118.69.71.224) [127.0.0.1] F=<[email protected]> rejected RCPT <[email protected]>:
2010-04-14 22:49:03 H=localhost (118.69.71.224) [127.0.0.1] incomplete transaction (RSET) from <[email protected]>
2010-04-14 22:49:05 H=localhost (118.69.71.224) [127.0.0.1] F=<[email protected]> rejected RCPT <[email protected]>:
2010-04-14 22:49:05 H=localhost (118.69.71.224) [127.0.0.1] incomplete transaction (RSET) from <[email protected]>
2010-04-14 22:49:08 H=localhost (118.69.71.224) [127.0.0.1] F=<[email protected]> rejected RCPT <[email protected]>:
2010-04-14 22:49:08 H=localhost (118.69.71.224) [127.0.0.1] incomplete transaction (RSET) from <[email protected]>
2010-04-14 22:49:10 H=localhost (118.69.71.224) [127.0.0.1] F=<[email protected]> rejected RCPT <[email protected]>:
2010-04-14 22:49:10 H=localhost (118.69.71.224) [127.0.0.1] incomplete transaction (RSET) from <[email protected]>
2010-04-14 22:49:13 H=localhost (118.69.71.224) [127.0.0.1] F=<[email protected]> rejected RCPT <[email protected]>:
2010-04-14 22:49:13 H=localhost (118.69.71.224) [127.0.0.1] incomplete transaction (RSET) from <[email protected]>

I dont know why, but i moved domain khanhlinhco.com.vn to another hosting, it's work fine.

Can you help me to solved this problem ?
Thanks

 

[ranz]

Here's what I get:

host -t mx phongvietco.com
phongvietco.com mail is handled by 0 mailbk.phongvietco.com.
phongvietco.com mail is handled by 0 mail.phongvietco.com.

$ telnet mail.phonvietco.com 25
[B]mail.phonvietco.com: nodename nor servname provided, or not known[/B]

$ telnet mailbk.phongvietco.com 25
Trying 210.245.122.8...
Connected to mailbk.phongvietco.com.
Escape character is '^]'.
220 sv18.visun.vn ESMTP IceWarp 9.2.1; Wed, 14 Apr 2010 23:33:34 +0700
mail from: [email protected]
250 2.1.0 <[email protected]>... Sender ok
rcpt to: [email protected]
550 5.7.1 <[email protected]> [B]Access to <[email protected]> not allowed[/B]

So I think the problem is with that domain's configuration for email.

 

[TonyTran]

Thanks Ranz,

1. You type wrong domain in second command, phongvietco.com not phonvietco.com.
2. I checked record mail.phongvietco.com is listed in XBL list of Spamhaus, is this problem?
http://www.spamhaus.org/query/bl?ip=115.84.178.2


So, what i need to do now ? Or any solutions to solved this issue ?

 

[ranz]

try my commands (with correct spelling of domains ) as shown in my posts to troubleshoot SMTP errors. It is probably handy to know the SMTP commands (click here for them: http://www.ranzs.com/?p=203)

you should organise to have that domain removed from the RBL list(s) in SpamHaus - ensuring (first of course) that there is no open relay on this server.

 

[nobaloney]

Nice little SMTP command review, ranz.

Would you consider researching how to do plain-text authentication in the SMTP handshake? I haven't had the time to do it.

Also, as a note: when you do the smtp handshake with every linux I've ever tried, you can use the backspace key. Maybe the difference is how it's interpreted my MSW?

Jeff

 

[ranz]

Hi Jeff,

Yes, most definitely ... in the making

smtp-auth usually needs base64 data - so you need to convert "plain" to base64. There are some online tools you can use - plus some command prompts too.

So you can do something like this:

echo [email protected] | base64
dXNlckBkb21haW4K
echo password | base64
cGFzc3dvcmQK

Then you use these in your "AUTH LOGIN" commands.

You could also do this with Perl:

#!/usr/bin/perl

use MIME::Base64;

# encode parameter 1
$encoded_usr = encode_base64($ARGV[0]);
# encode parameter 2
$encoded_pwd = encode_base64($ARGV[1]);

#$decoded = decode_base64($encoded);

print $encoded_usr;
print $encoded_pwd;

and run the perl script like:

./base64encoder.pl username password
dXNlcm5hbWU=
cGFzc3dvcmQ=