Error Settting Outlook 2013

Hi, I’m setting up my mail in Outlook, Virtualmin I installed on my server and send me the following error I should do to run my mail in outlook?

Log onto incoming mail server (POP3): Your e-mail server rejected your login. Verify your user name and password for this account in Account Settings. The server responded: -ERR authentication failed

username and password are correct

in turn I get this error when sending mail, only I happen with those, I tried, Gmail. Hotmail and corporate without any problem, I think it has something to do with Outlook

This is the mail system at host

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<>: host[] said: 550 5.7.1
    Service unavailable; Client host [] blocked using FBLW15; To
    request removal from this list please forward this message to (in reply to RCPT TO command)
Reporting-MTA: dns;
X-Postfix-Queue-ID: 01E8028B8E
X-Postfix-Sender: rfc822;
Arrival-Date: Mon, 31 Aug 2015 14:00:23 -0400 (EDT)

Final-Recipient: rfc822;
Original-Recipient: rfc822;
Action: failed
Status: 5.7.1
Remote-MTA: dns;
Diagnostic-Code: smtp; 550 5.7.1 Service unavailable; Client host
    [] blocked using FBLW15; To request removal from this list
    please forward this message to
Return-Path: <>
Received: from (localhost [])
    by (Postfix) with ESMTPA id 01E8028B8E
    for <>; Mon, 31 Aug 2015 14:00:23 -0400 (EDT)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple;; s=2015;
    t=1441044023; bh=SOOISzxeGdb0lzKwr/iT0SCyMjg2yxEGvZM7970WS2I=;
MIME-Version: 1.0
Content-Type: multipart/mixed;
Date: Mon, 31 Aug 2015 15:00:22 -0300
From: Victor Saez <>
Subject: Imprimir Porfis Hermano querido
Organization: ActiveWeb
Message-ID: <513bfb98faf728a616e9f80841881a27@##str_replacement_1##>
User-Agent: Roundcube Webmail/1.1.2

excuse my English is horrible XD

I would greatly appreciate your help

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Ok, there are some settings to configure some emails in Outlook ?, MX record, TXT or something? because add the SPF and DKIM record … but I do not know what else to configure …

It looks like your IP address is just blocked by Microsoft’s servers, as they believe it may be a source of spam. Just as the error message says in the header information, forward a the email to and request they remove the block. Be sure you include that header information with the email too.