One definite fact these days is inbound marketing which spans around not only relationship building calls but also email spamming. Even I receive tons of it every day, and I’m sure you do too.
Mainly these bad email practices cause delivery system issues like blocked, returned and spam categorized. These in turn impact the sender’s email allowance negatively. The mailbox providers may even put the sender into their blacklists to protect its users from unreasonable emails. Almost all the major mailbox providers like Gmail, Outlook/Hotmail, Yahoo, etc. have their own blacklists.
Reasons Why Hotmail Can Blacklist Your IP?
Before you proceed any further, it’s important to know why you were blacklisted to better understand and fix the issue. Some behaviour of yours might have violated the rules of your email provider and you need to stop at once! So, don’t simply jump to the blacklist removal process, and let’s understand the situation! The most common situations when Hotmail blacklists your IP are:
- High bounce rates.
- High volume of similar emails generated from your IP address.
- Reports of spam from other users.
- Wrongly configured DNS Settings.
- Bad IP/domain reputation.
Now, how shall you diagnose the reason that triggered your IP being listed in the blacklist? You need to follow these few simple steps:
- Firstly, review your server statistics to notice any sudden spikes in the email volume over the past 3-10 days.
- Check your SMTP(Simple Mail Transfer Protocol) for any issues with your email account.
- Configure your PHP scripts to log mail using the mail.log ini entry.
- Select anyone blacklists detect tool and look up for your IP in the list.
- Every server has a sending reputation recorded at SenderScore.org. Check whether your server score is more than 75 (80 is preferred).
- Check for bulk emails sent to the same domain be it, Hotmail.com, live.com, outlook.com or msn.com
- Check for any newsletters or brochures that originated from the server.
- Check for any bulk marketing campaigns and promotions on the server.
- Check for correct DNS entries (PTR, DKIM, SPF).
These steps may take a few hours but you can’t rely on any other tools to do these tasks so accurately for you.
Example of a Hotmail bounce notice:
The code in the hotmail rejection notice gives you a clue about the reason why your IP was blacklisted.
List of Hotmail/Outlook SMTP bounce codes:
|421 RP-001||The mail server IP has exceeded the rate limit allowed. Reason for rate limitation being related to IP/domain reputation. Please contact your Email/Internet Service Provider for help.|
|421 RP-002||Another case of exceeding the rate limit allowed. Reason being related to IP/domain reputation.|
|421 RP-003||The connection limit allowed has been exceed. The reason for limitation being your IP/domain reputation.|
|550 SC-001||Your mail was rejected by Outlook.com violating its policy norms. Reasons being content with spam-like characteristics or IP/domain reputation. You need to ask your Email Provider for help.|
|550 SC-002||Your mail was rejected by Outlook.com violating its policy norms. The mail server IP has exhibited namespace mining behavior. You need to ask your Email Provider for help.|
|550 SC-003||Mail rejected by Outlook.com for policy reasons. Your IP address may be from an open proxy easily accessible to all users.|
|550 SC-004||Your mail was rejected by Outlook.com violating its policy norms. Reason being registers of spam reports from many users who received your mail. You need to ask your Email Provider for help.|
|550 DY-001||Your mail was rejected by Outlook.com violating its policy norms. You might be having a dynamic IP on which you can’t SMTP to send emails. To know whether your IP is residential or dynamic, visit ‘http://www.spamhaus.org’|
|550 DY-002||Your mail was rejected by Outlook.com violating its policy norms. The likely cause being a compromised or virus infected server/personal computer. Please contact your Email/Internet Service Provider for help.|
|550 OU-001||Your mail was rejected by Outlook.com violating its policy norms. For more information about this block and to request removal of block, visit: http://www.spamhaus.org.|
|550 OU-002||Your mail was rejected by Outlook.com violating its policy norms. Reasons for rejection being spam content or poor IP/domain reputation.|
Hotmail Blacklist Removal Instructions:
- After you complete the above investigation process and now you know the source of error, you can proceed with the block removal process.
Again, before contacting Microsoft, check these points:
- Check whether your IP address is listed on Spamhaus or any major email blacklist even now.
- Visit the SenderScore website and check your score to be over 75, preferably 80.
- Recheck your DNS settings to confirm that there are no more errors.
Once done, now you can proceed with the ‘Hotmail Blacklist Removal’ process:
- Complete the Sender Information Form and enter all the requested details.
- You shall need to run some telnet tests from the command line on your server.
- With MSN, be sure to check the order of your DNS, PTR and SPF/SenderID records before requesting removal.
If you follow these few simple steps, and you truly are not spamming, you shall see your IP address removed from Outlook’s blacklist.
So, this way you can remove your IP from Outlook blacklist. Also, make sure to visit the troubleshooting pages on Microsoft website that are related to your case. You might find something to help yourselves with!