Mailchimp Sending Domains

Comments

1. Jim says

   October 22, 2014 at 11:34 pm

   Very helpful and much appreciated, I have been looking for a list of their domains so I can block them all, I run the email system for a large school. Far too much spam from them and their abuse desk refuses to respond to reports.

   Reply

   • Gary says

     October 24, 2014 at 12:09 pm

     @Jim, sure. No worries. Are you sure it’s Mailchimp from whom you’re receiving the spam? They go to extraordinary lengths to minimise the chance of spam being sent – see https://organicweb.com.au/18596/internet/email-marketing-spam/

     Reply

     • Anonymous says

       January 28, 2016 at 9:06 am

       In fact, the fact that they use so many domains as the sender, and seem to encourage mutating the underlying sender address, makes them particularly attractive to spammers. Indeed the use of so many mail domains is on its own a very strong indicator that their intention is to take the business of spammers, and that any words about spam said to the public are just lip service.

       The multiple domains just does not make sense unless it is to frustrate spam filtering.

       Load balancing does not explain it. There are many techniques for load balancing that do not require this, and presumably they are not so incompetent as to be unable to use one of the many other techniques that do not require separate sender domains.

       Mailchimp could of course prevent this by ensuring that each customer could only ever send with one sender address, but they do not do that. In fact I don’t think I have ever seen the same sender address from a Mailchimp domain twice.

       Better advice would have been “Don’t use Mailchimp, because your messages will be blocked or filtered by many, maybe even most, of your recipients, without you even knowing about it. Mailchimp is known for harbouring spammers and making it more difficult for the recipients to block individual spammers, and your particular message is probably not important enough to your recipient for them (or the controller of the domain) to remove the block or filter and suffer all the other spam, just to get your message.”

       Reply

2. tva says

   October 29, 2014 at 5:00 am

   I sure as hell know I’m not subscribed to any of mailinglists that mailchimp tries to push to me. Complaints won’t work, fortunately my own DNSBL will do. Over 300 messages blocked this week for my personal domain and for whole server it’s way more. Same sh*t as with *.howeverall.net.

   Reply

3. J Donovan says

   February 4, 2015 at 1:03 am

   It’s great that mailchimp lists all the domains here. I’ve never noticed that mailchimp would be the source of spam. Mostly it is ebay sellers who add my email to their lists unbeknownst to me and all mailchimp ones are ones I have implicitly or explicitly given my approval. So all good on that front.

   I’d venture that most of the spam delivered by mailchimp relates to some trial software etc. where the user went and entered the email address without full knowledge what will be done with it (and I’m sure there’s a 10 page long terms of service no one actually reads).

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4. Frank says

   May 21, 2015 at 3:21 pm

   Thanks very much.
   The list is much appreciated.

   Reply

5. Adam Erickson says

   June 18, 2015 at 2:52 am

   Blacklisting *.mandrillapp.com would alleviate a LOT of spam from my email.

   Reply

   • Gary says

     June 18, 2015 at 10:21 am

     I use Google Apps and very little spam gets undetected. What worries me about blacklisting *.mandrillapp.com is that then alot of genuine email will get blocked 🙁

     Reply

     • Joshua Shedd says

       July 22, 2017 at 4:44 am

       Glad I found this list because now I can wildcard block these dang servers – As for genuine mail being blocked, not my problem, thats the problem of the sender signing up with these types of places. Maybe they should spend the 19.99 a month to by a real domain to send emails through if they want to keep in touch 😉

       Reply

6. Bill Sweeney says

   July 14, 2015 at 11:39 pm

   I’m asking very seriously here: Is there any legitimate email at all that comes via Mailchimp? it seems like _everything_ I get from these domains is spam. Sure, some of it is because my name was given by a company I’ve done business with to one of it’s affiliates, but really it seems like every mail from *.mcdlv.net is essentially an unsolicited sales message. It’s awful the way unscrupulous companies are basically using Mail Chimp to run screen for their spamming sales behavior.

   Reply

7. Bin says

   September 3, 2015 at 5:42 am

   I know this is quite old but I’m desperately trying to find an up to date version this domain list somewhere on the internet, but I just can’t find it. Can somebody help me?

   Reply

   • Gary says

     September 5, 2015 at 9:21 pm

     You may find a newer list at https://organicweb.com.au/19892/email-marketing/mailchimp-domains-subdomains/

     Reply

8. Greg Durham says

   January 7, 2016 at 3:46 am

   Thanks for the list. All these will get blocked on our spam filtering gateway serving dozens of clients. No, it’s not my job to stop your customers using your service to send spam, it’s yours. So I’ll block your domains. If you idiots actually allowed people to report spammers using your services instead of making it as difficult as you possibly can this wouldn’t be necessary. Looking forward to when your business goes down the tubes.

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9. Jim Brobdren says

   February 2, 2016 at 10:14 am

   Seriously? And why in the seven h*lls do you NEED to have this many domains for??? If you WANT your emails to get through, then you just present a single easily filterable email address and that’s that. I’ve subscribed to two news sites that use your “service” and none of their addresses for the last month even show up here! You make it difficult to filter, because you WANT to be difficult to filter. So you cannot be black listed, but HELLO; you now cannot be white listed either. I’ll be sure to contact my content providers that I will not be getting their emails through because of this.

   Reply

   • Gary says

     February 4, 2016 at 11:37 am

     @Jim, I assume your rant is directed at Mailchimp and not me? 🙂

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     • John says

       August 25, 2017 at 3:11 am

       I have never received one good mail through mailchimp, and I have to unsubscribe each one of them to avoid receiving any additional mail. The main objective of using mailchimp is to get around spamfilters it seems, and that objective alone is sufficient for me block mailchimp entirely. Legitimate mailers should not be concerned about spam filters and send their mail.

       Reply

       • Gary says

         August 25, 2017 at 2:55 pm

         John, the best thing to do is mark unsolicited email (i.e. those you didn’t subscribe to) as junk/spam. Once you mark as junk/spam then the various spam filters will learn that the sender is a spammer.
         i.e. mark the messages as junk/spam and don’t unsubscribe as unsubscribing won’t hurt the spammer however being marked as a spammer will.

         Reply

   • Brett Anderson says

     July 26, 2017 at 5:24 am

     I wouldn’t recommend this but if you wanted to block all emails from mailchimp, you could deny all their IP’s: 205.201.128.0/20 198.2.128.0/18 148.105.0.0/16

     OR you could whitelist using the IP’s above.

     Mailchimp follows rules and has legitimate unsubscribe function, so there is no need to block everything. Here’s the source article from mailhcimp support: https://mailchimp.com/about/ips/

     I have found as a Office 365 mail admin, you can only whitelist 256 IP’s at a time!! That means you’d have to add 339 class C subnets to whitelist or block mailchimp!!! aiiiigggghh

     Reply

10. Jain says

    May 31, 2016 at 4:30 pm

    I need E-marketing,

    Reply

11. aha says

    March 11, 2017 at 7:01 am

    Good, no I can block these domains 🙂

    Reply

12. GD says

    April 21, 2017 at 6:32 am

    You don’t need to know all the domain..
    Just tell it to block emails with the word ‘mailchimp’ in the email header.
    It’s too bad that a lot of legit places use their services though.. So once you set this block, make sure to check your spamfolder more often.

    Reply

13. John says

    August 25, 2017 at 3:13 am

    Glad to have this list. I was getting tired of unsubscribing email I received through mailchimp. The objective I see for mailchimp is to get around spam filters, and that is enough for me to block them completely.

    Reply

14. UweHa says

    August 6, 2018 at 7:50 pm

    Just checked my No-no-list in Outlook: full of Mailchimp-Addresses.
    Now I completed the domain list with the help of your listing. Thanks.

    Reply