It’s a lovely morning and you have lots of mail to send. You take a sip of your coffee, with a refreshed mind you start working, and it’s then you hit a setback. All the mails that you send to a Hotmail or Outlook recipient, starts to bounce back. It takes you seconds to realize that your mail is blocked by Hotmail or Outlook. The situation can be anything like this, and there’s a better solution to the problem than losing one’s mind, out of anger. This post will guide you through the steps to carry out in order to remove your Hotmail email is from the blacklist.
If your email has been blacklisted by Hotmail, you might receive a message like :
550 SC-001 (SNT004-MC1F52) Unfortunately, messages from 1**.**.**.*** 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.
We are going to go sequentially, in the way things should be done. Jumping over steps won’t help in most cases. First, let’s understand the possible reasons for the mail I’d being blacklisted.
Now, an email can be blacklisted for the following reasons:
- Your mail has been hacked by someone with evil intentions and is using it to spam other users, from where it has been blacklisted. It might also happen that your computer was affected by a trojan that has turned it into a spam – zombie, i.e., using it to send automated spam mail. Make sure your mail is not being used for namespace mining.
- You might be using your mail to send certain monthly articles to the subscribed users, but due to negligence, users who have unsubscribed from the mailing list are still being burdened with these mails thus being forced to report rot as spam.
- This reason is though uncommon might be on of the reason. Sometimes, faulty DNS setting or due to poor reputation of the IP Address in the server. Hotmail does not accept mail fro senders failing a reverse DNS lookup.
Microsoft uses Exchange Online Protection and Smart Scree spam filter to protect its user from being spammed. These generally monitors the IP and domain reputation and authentication, complaint rates and also reviews content and engagement. They also leverage SPF, an email authentication technology protocol that helps address the problem of spoofing and phishing by verifying that the domain sending the emails is authorised to do so.
Hotmail provides a blacklist code, with its error message, and generally the 500 series errors denotes possible blacklisting cases. Some other codes generally denotes other form of errors and requires a different approach for solution.
In every case, you have to understand the reason behind the reports related to your email. Without, first determining the root of the problem and correcting it, any further steps would not result in any permanent solution. For example, if you directly approach for delisting from the blocked addresses of Hotmail, without first fixing the issue, you will end up being blacklisted again. Follow these steps in order to resolve the problem-
- For the first step, make sure that your mail is not listed with some of the famous public spam filtering sites. Now there are three types of the blacklist:
- Public blacklist
- Enterprise SPAM blacklist
- Private / ISP blacklist
There are various websites that provide this service of checking whether your mail is marked as spam in any of the public blacklist databases. Here are some of them:
If you find yourself listed in any of the public blacklists, first make the effort to delist yourself from them. If you do not do this, you might end up being back in the blacklist again.
- In case, the cause of the undesirable messages, was some sort of pre-residing trojan, make sure to remove it. Essentially, clear your system of all possible threats both automated and manual and also ensure that the account is secure enough.
Make sure that your sending reputation at Sender Score is pretty high, preferably 80. Try to ensure that your server is not being used to send unauthorized mails with malicious contents, or technically those that are categorized as spams. Monitor the server logs looking for mails being sent to Hotmail or Outlook profiles and try to determine the source.
- As a final requirement, properly configure your DNS and other settings. Join the Microsoft JMRP ( Junk Mail Reporting Partner Program), to keep track of mails under the Hotmail blacklist. Also, register for the Microsoft SNDS ( Smart Network Data Services) to keep track of the traffic on the Hotmail I’d for each of its up address.
- Once you are done with the above steps, comes the final step to approach for delisting of the mail address from the Hotmail’s blacklist. Head over to the following link :
Sender Information Form. A screenshot of the form is provided at the end, so might get a hint of the necessary details.
Once you have filled and submitted this preliminary form, wait for a response from the Microsoft Support team. They are going to ask you to submit further details related to the request, as well as ask for results of some queries carried out from your command line. Be careful in providing the exact details they are asking for.
By following the steps, you will be removed from the blacklist in probably 2-3 days (sometimes in the same day), and you can carry on with your task.
Hope, this article has been of some help to your problem. For any suggestion, feel free to comment.
A Screenshot of the Form