Hi I’m trying to block email addresses from a particular domain - from which we seem to receive multiple spam user accounts per hour sigining up. They come from .jil.kr where can be one of some 20 or so names I’ve seen so far. I tried adding jil.kr but that doesn’t match, so then tried *.jil.kr instead but that gives an error in the log that the regex is invalid as there’s no subject for the * character, so I then tried (.*).jil.kr and that doesn’t match either - I think because the . character in the brackets is being escaped. Is it possible to add an entry for *.jil.kr?

[image] Alex_Harrington: Is it possible to add an entry for *.jil.kr? Yes, simply add jil.kr as I believe it enforces for all subdomains.

[image] codinghorror: Yes, simply add jil.kr as I believe it enforces for all subdomains. I did already try that, but I’ve put it back in and will see today if we get another signup from a subdomain of that. Thanks Alex

Ok, let me know if it does not work. It should, if not we will make it work!

So with jil.kr in the email domain blacklist, we just had a signup from vil7421@stock.jil.kr so it doesn’t appear to work at present. Also just now another from fdzr2860@bank.jil.kr and another from prvhu5960@site.jil.kr Sorry!

It must be considering everything after the @ to be the domain as opposed to “ends with” Depending on how many variations are possible you’ll be playing whack-a-mole without some form of regex here.

[image] Mittineague: Depending on how many variations are possible you’ll be playing whack-a-mole without some form of regex here. How about in addition to an exact match, if the end matches and the email address has a period immediately preceding the specified domain, that’s also a match.

@techapj please make it so that this does a simple exact match, and then a ‘period ends with’ match on the string. So if someone enters jil.kr in the email domain blacklist it will match all these: foo.jil.kr bar.jil.kr jil.kr but it should not match mejil.kr

Email domain blacklist with wildcards

Product Support

techAPJ (Arpit Jalan) May 13, 2015, 12:21pm 10

Okay, made it so:

https://github.com/discourse/discourse/pull/3463

Topic		Replies	Views
Email domain blacklist with wildcards (revisited) Feature	5	2650	September 20, 2017
Use of an asterisk in blocked email domains prevents registration from any email address Bug	3	1638	January 20, 2023
Add wildcard top and/or second level domains to whitelist for inclusion Feature	3	1614	May 14, 2015
Blocking spammer.<random>.domain registration attempts Product Support	11	715	October 8, 2025
Automatically add users to group based on part of email domain Product Support	2	895	December 17, 2021

Email domain blacklist with wildcards

Related topics