SMTP Getting Blocked

[Spetsnaz]

So I have installed NGIX for apache, Also LiteSpeed for alternative.
I also installed CSF and Mod_Security default.
After that my emails never have been sent, I can receive e-mails from anyone but I cannot send.

 

[Eric]

Howdy,

What error message do you get?

Thanks!

 

[Spetsnaz]

How may I check the error I get?

 

[cPanelMichael]

Hello

It depends on the method you are using to send emails. For example, does the delivery fail in your email client? Or does it send out successfully and never reach it's destination? The following log file may be helpful if it sends out successfully from your email client:

# /var/log/exim_mainlog

Thank you.

 

[Spetsnaz]

I recently got a failback on squirrelmail

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email protected]
    SMTP error from remote mail server after MAIL FROM:<[email protected]>
SIZE=2343:
    host mx3.hotmail.com [65.55.92.152]: 550 OU-001 (SNT0-MC2-F48) Unfortunately,
messages from SERVERIP weren't sent. Please contact your Internet service
provider since part of their network is on our block list. You can also refer
your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.

------ This is a copy of the message, including all the headers. ------

Return-path: <[email protected]>
Received: from localhost.localdomain ([127.0.0.1]:58230 helo=spetsnazforum.com)
        by server1.spetsnazhost.com with esmtpa (Exim 4.77)
        (envelope-from <[email protected]>)
        id 1T8trE-0006y9-Sm
        for [email protected]; Tue, 04 Sep 2012 07:12:01 -0700
Received: from 70.173.58.33 ([70.173.58.33])
        (SquirrelMail authenticated user [email protected])
        by spetsnazforum.com with HTTP;
        Tue, 4 Sep 2012 07:12:00 -0700
Message-ID: <[email protected]>
In-Reply-To: <[email protected]>
References: <[email protected]>
Date: Tue, 4 Sep 2012 07:12:00 -0700
Subject: Re: ****************
From: [email protected]
To: "Spetsnaz Spetsnaz" <[email protected]>
User-Agent: SquirrelMail/1.4.22
MIME-Version: 1.0
Content-Type: text/plain;charset=iso-8859-1
Content-Transfer-Encoding: 8bit
X-Priority: 3 (Normal)
Importance: Normal
X-cPanel-MailScanner-Information: Please contact the ISP for more information
X-cPanel-MailScanner-ID: 1T8trE-0006y9-Sm
X-cPanel-MailScanner: Not scanned: please contact your Internet E-Mail Service
Provider for details
X-cPanel-MailScanner-SpamCheck: 
X-cPanel-MailScanner-From: [email protected]
X-Spam-Status: No

I logged in via putty and this is what I get

bash: /var/log/exim_mainlog: Permission denied

 

[cPanelMichael]

The bounce message you received indicates that Hotmail is blocking mail from your server. They have provided the following URL for more information about why you were blocked:

Troubleshooting Windows Live Mail

In particular, you were blocked with the code of "550 OU-001".

I logged in via putty and this is what I get

bash: /var/log/exim_mainlog: Permission denied

I provided the location of the log file. You have to use a command to search or view the log file. EX:

# tail -f /var/log/exim_mainlog
# exigrep [email protected] /var/log/exim_mainlog

 

[Spetsnaz]

Thank you, also is there a way to prevent my server from sending spam emails?
How do I check if other e-mail providers blocked my IP?
Because in googlemail I got the e-mail.

 

[cPanelMichael]

The following forum post should be useful:

Spam Prevention Options

The following third-party tool may be helpful in determining which blacklists your server's IP address is on:

Email Blacklist Check - See if your server is blacklisted

However, you have to keep in mind that some blacklists will have every IP address or will always appear as a "warning".

Thank you.

 

[Spetsnaz]

Thank you very much for all the help.
1 Last question is how can I tell hotmail to unblock my IP?

 

[cPanelMichael]

Thank you very much for all the help.
1 Last question is how can I tell hotmail to unblock my IP?

The instructions are provided in the previous URL provided:

Troubleshooting Windows Live Mail

In particular, you were blocked with the code of "550 OU-001", so you have to look up that code on the above URL for the removal instructions.

Thank you.

 

[Spetsnaz]

Alright thank you for all the help in the past 2 days.