Solved

Blacklisted email; blocked by sender or recipient?

Posted on 2010-09-22
6
546 Views
Last Modified: 2012-05-10
If a domain has been put on to a email blacklist, for appearing as a spammer, at what point will that blacklisted domain be blocked, when they send email or when the recipient is about to receive it? and what's the best way to get removed from the blacklist?
0
Comment
Question by:canalicomputers
6 Comments
 
LVL 20

Accepted Solution

by:
wolfcamel earned 500 total points
ID: 33740306
it is the receiver's mail server that does the antispam checks.
getting removed depends on which blacklist you are on - some automatically remove you after 24 hours of not sending spam, others will require you to put in a request
0
 
LVL 12

Expert Comment

by:mccracky
ID: 33740310
Mostly just on the receiving end is where it is blocked.

Check the policies of the blacklists.  Most of them have the steps needed to get removed from their blacklists.  (e.g. configure reverse DNS, make sure you're not an open proxy, SPF records, etc.)  Each blacklist differs slightly.  You need to read through their policies and correct what got you put on the list and then usually request removal to them.
0
 
LVL 20

Assisted Solution

by:wolfcamel
wolfcamel earned 500 total points
ID: 33740312
there are a large number of websites that will query the popular blacklists and tell you which ones you are one - then you can visit the website for each one and look to get removed.
Assuming you have fixed the problem causing your server/machine to send or relay spam.

Google DNS blacklist lookup
0
Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

 
LVL 1

Expert Comment

by:ctown_larrymac
ID: 33748029
To expand on wolfcamel's response to the first part of your question: it's almost always the receiver's icoming server that blacklists a spammer (as opposed to the outgoing server of the alleged spammer), so the email is blocked at the delivery point.  You should be able to look at the headers to see exactly where the message was stopped.
0
 
LVL 32

Expert Comment

by:aleghart
ID: 33750773
A domain is not usually the subject of a blacklist for e-mail server purposes.  Otherwise, yahoo.com and aol.com mail would be completely banned due to spoofed messages.

Blacklists are used by receiving SMTP relays to look up the sending SMTP relay.  The results of an RBL (real-time blacklist) lookup do not "block" anything.  The response of the RBL is used by a scoring system on the receiving SMTP relay.  It's up to the server admin what to do.

It has little to do with what your domain name is in the offending messages.  Any IP address could have hundreds of domains using it.  Any domain could be using hundreds of IP addresses to send mail.

But, as others have described, the process for each blacklist is different.  Best to find out which you have offended and follow their procedures.  Nagging the admins or getting on a soapbox doesn't work.

1. Stop sending spam
2. Then use the automated methods for removal.

If you don't those two things first, then sending mail to an admin will usually be returned with more than a bit of sarcasm.
0
 

Author Closing Comment

by:canalicomputers
ID: 33752943
Thanks guys
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Gmail Account risks 4 78
Getting EventID 4625 logon failures 18 106
Server 2012 R2 Term Server Directory/File Permissions 5 119
By pass website on ASA for Websense 4 53
For many of us, the  holiday season kindles the natural urge to give back to our friends, family members and communities. While it's easy for friends to notice the impact of such deeds, understanding the contributions of businesses and enterprises i…
A customer recently asked me about anti-malware and the different deployment options available for his business. Daily news about cyberattacks, zero-day vulnerabilities, and companies that suffered a security breach made him wonder if the endpoint a…
In this Experts Exchange video Micro Tutorial, I'm going to show how small business owners who use Google Apps can save money by setting up what is called a catch-all email address in their Gmail accounts. By using the catch-all feature, small busin…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now