title: Hotmail rejecting all emails using Mailgun or SparkPost
body: <p>I have been trying to send mail using Laravel. I have been successful in integrating Mailgun/SparkPost in my application. It is sending mail to every other domain except for Hotmail/Outlook/MSN/Live. 
  Somehow they are saying that the IP I am trying to send mail from is on their blocked list.</p>
  
  <p>This is the error message i keep on getting: </p>
  
  <blockquote>
    <p>Failed: postmaster@stelp.pk → sark_92@hotmail.com 'User Verification
    Reminder Mail' Server response: 550 5.7.1 Unfortunately, messages from
    [184.173.153.200] weren't sent. Please contact your Internet service
    provider since part of their network is on our block list (S3140). You
    can also refer your provider to
    <a href="http://mail.live.com/mail/troubleshooting.aspx#errors" rel="noreferrer">http://mail.live.com/mail/troubleshooting.aspx#errors</a>.
    [HE1EUR01FT063.eop-EUR01.prod.protection.outlook.com]</p>
  </blockquote>
  
  <p>When I tried to reach out to Hotmail's support and explained my issue to them, this is the reply I got from them. </p>
  
  <blockquote>
    <p>Dear Abdur Rehman Kazmi</p>
    
    <p>We have completed reviewing the IP(s) you submitted. The following
    table contains the results of our investigation.</p>
    
    <p>Not qualified for mitigation
    184.173.153.200 Our investigation has determined that the above IP(s) do not qualify for mitigation. These IP(s) have previously received
    mitigations from deliverability support, and have failed to maintain
    patterns within our guidelines, so they are ineligible for additional
    mitigation at this time.</p>
    
    <p>Please ensure your emails comply with the Outlook.com policies,
    practices and guidelines found here:
    <a href="http://mail.live.com/mail/policies.aspx" rel="noreferrer">http://mail.live.com/mail/policies.aspx</a>.</p>
    
    <p>To have Deliverability Support investigate further, please reply to
    this email with a detailed description of the problem you are having,
    including specific error messages, and an agent will contact you.</p>
    
    <p>Regardless of the deliverability status, Outlook.com recommends that
    all senders join two free programs that provide visibility into the
    Outlook.com traffic on your sending IP(s), the sending IP reputation
    with Outlook.com and the Outlook.com user complaint rates.</p>
    
    <p>Junk Email Reporting program (JMRP) When an Outlook.com user marks an
    email as "junk", senders enrolled in this program get a copy of the
    mail forwarded to the email address of their choice. It allows senders
    to see which mails are being marked as junk and to identify mail
    traffic you did not intend to send. To join, please visit
    <a href="http://support.msn.com/eform.aspx?productKey=edfsjmrpp&amp;page=support_home_options_form_byemail&amp;ct=eformts" rel="noreferrer">http://support.msn.com/eform.aspx?productKey=edfsjmrpp&amp;page=support_home_options_form_byemail&amp;ct=eformts</a>.</p>
    
    <p>Smart Network Data Services program (SNDS). This program allows you to
    monitor the ‘health’ and reputation of your registered IPs by
    providing data about traffic such as mail volume and complaint rates
    seen originating from your IPs. To register, please visit
    <a href="http://postmaster.live.com/snds/" rel="noreferrer">http://postmaster.live.com/snds/</a>.</p>
    
    <p>There is no silver bullet to maintaining or improving good IP
    reputation, but these programs help you proactively manage your email
    eco-system to help better ensure deliverability to Outlook.com users.</p>
  </blockquote>
  
  <p><strong>I am using Laravel 5.4 and i am able to send mails to every other network i.e gmail/yahoo</strong> </p>