Looking for Beta Testers for a Customizable RBL

M

mobilephase

New Member
Dec 25, 2025
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Hi everyone,

I’ve reviewed the rules and believe this post is allowed. If not, my apologies, I don’t mean to break any guidelines.

In the ongoing battle against spam, I’ve explored many solutions, including RBLs. The problem with traditional RBLs is that you are often at the mercy of the list. You can tweak each mail server’s settings, but I wanted something fully customizable and portable across servers, a personal RBL.

So I built one. It is a pre-populated RBL where you can maintain your own whitelist and blacklist, and it also includes built-in GeoIP blocking. The project is still in the early stages, and I am looking for beta testers to help refine it.

Being able to add GeoIP filtering to any mail server simply by adding the RBL URL is a huge advantage.

If you would like to check it out and become a beta tester, please send me a message and I will grant you access. I am excited to see it in action and would love to collaborate with others who might find it useful.

Thank you!
 
How does GeoIP blocking for SMTP at PMG/MTA level make sense?

I have seen it implemented at the mail server level and also used it this way: for protocols where users login. If you only have users in country X you can block the rest... but this means if someone travels those restrictions need to be lifted. And the GeoIP database always has to be up-to-date. Not elegant.

One option to enable GeoIP blocking on SMTP was when AUTH is used. But this wouldn 't work on PMG. This is useful for a mail server when there are no users in country X, but still want to receive mails from that country.
 
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The GeoIP database is maintained, the end user does not have to maintain that. The user moving around country to country does not change where the mail server is sending from, you can also whitelist individual ips and set the countries you need. I have had many use cases where this would make sense. If it doesn't make sense and isn't the solution for your use case that is fine.
 
Color me surprised, I just couldn't imagine many use cases where (on the SMTP mail receiving level) it would make sense to block incoming mail based on country. I sure wish sometimes it was that easy though... the best of luck and happy new year!
 
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GeoIp is only one part of the entire project, it doesn't need to be used if it's not needed. Your welcome to check it out if you would like.
 
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