With SpamHaus you can create an account to whitelist your domain and IP's. Though, you have to show ownership over the IP's in question to do this with. This is how Xfinity and others are able to avoid these problems, they have their IP ranges whitelisted. If you don't have control over the IP's you use, you're just assigned them from your provider, encourage your host to take measures like I described with SpamHaus.
You can also try to ensure your domain verification is solid. Like, ensure DKIM and SPF is working properly in your DNS, and if you have a website on it, ensure your SSL certificates are legit and refer to your domain. This should be easy with LetsEncrypt. Anything to help show that the domain and it's IP's it's using are legit, not used for fraud.
Alternatively, you can always find an email server you trust to relay through. That'll help, but, you risk the relay monitoring your email. Email is inherently insecure, so relying upon it for secrecy is a fools errand anyways.
Will
I've had the same problem with that blacklist, and I was advised that it's essentially an extortion racket: you pay to get off for some period of time, and then you end up back on. Which is exactly what happened to me.
My domain is hosted on Digital Ocean, and I was able to fix it by moving my DNS to Cloudflare, then enabling the Cloudflare DNS proxy feature so my domain would no longer be associated with an offending IP range.
Also, the IP for tilde.club is on an email server blacklist.
https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a142.44.150.184&run=toolpage
Should be a process to get removed from that list, I know there is from
Barracuda's blacklist as well as SpamHaus.
It could be that just not having a proper DKIM sig may trigger that
blacklist though. There's a lot of blacklists out there and many work
differently from one another.
Will
On Tue, 30 Dec 2025, Alexander wrote:
> That is a problem that is caused by the uptight spam filter on Gmail which
> relies among other things on DKIM signatures and SPF which does not really
> play well with mail lists and tilde.club itself does not process DKIM
> signatures. There are a few mail protocol extensions that kind of mitigate
> that issue, but the only thing that is really working is to use a tilde.club
> email to send the mails
>
>
> On 30/12/2025 14:03, lab6 wrote:
>> Hello all,
>>
>> I’m not sure if this is the right place to say so, but I’ve noticed email
>> to this mailing list being persistently classified as spam when it arrives
>> at my Gmail account, despite me telling Gmail it looks safe. I’ve had to
>> set up a filter to whitelist the tilde.club domain. Of course, if this is
>> a problem for you too, you probably won’t see this message. Seasons
>> greetings and a pre-emptive Happy New Year to you anyway!
>>
>> James from Lab6
>>
>> Sent from my iSeries
>
>
-- Will Pearson -----PGP FINGERPRINT----- 546A3 BD55E 5D52E 4A7AC E68EF 95776 DB49D 52C46