The increasing tendency by tech giants to block independent mail servers has made private hosting a complex challenge. By making it easy to keep mail running smoothly, @lightmeter helps re-decentralize worlds’ most used digital communication channel. @NGIZero is proud to fund @lightmeter developing the first open source email delivery monitoring tool to add among which detection of third party mail blocking & a mailserver configuration assistant ->

@Coffee @NGIZero @NGIZero @lightmeter this is very much needed, but why is this happening in the EU? Most EU residential Internet providers block outbound port 25, so it's moot to Europeans that #Google & #Microsoft block inbound port 25. They need to stop ISPs from blocking port 25 before they can begin to acknowledge what Google and MS does.

@lightmeter @NGIZero @Coffee US ISPs, for example, allow egress port 25 packets, so it's generally only the receiving mail servers of tech giants (Google, MS, Yahoo) that stand in the way. This is where the battle should be fought. BTW, b/c Google, MS, & Yahoo block mail from residential IPs, I refuse to email their users. I tell those users to get an email acct that works.

@Coffee @Coffee @NGIZero @lightmeter #Protip for EU consumers: before subscribing to Internet svc, 1st ask the ISP if they block anything. They always say "no" b/c salesppl don't know that a few ports are always blocked. Try to get that in writing. After they setup your connection, tell them of the "false advertising". Merchants must honor their contracts & claims (and they will).

@lightmeter @NGIZero @Coffee Generally, they will give you a free upgrade to a business acct (so you can run your own mail svr from home)

@aktivismoEstasMiaLuo Good tip! A business DSL line in Berlin costs €€€ so worth the effort

Thanks. If I ever become interested in private hosting again, this is a nice trick to have up my sleeve.
@NGIZero @lightmeter

@aktivismoEstasMiaLuo Using residential connections is not our current use case, but there are potential workarounds for the future (e.g. relay service).

Are you sure that those large inbox providers block residential IP ranges? They put effort into updating those blocklists? 🤔

@lightmeter Yes. The large ISPs voluntarily submit their dynamic IP ranges to scumbags like #SpamHaus, effectively blacklisting their own customers. That happens both in Europe & the US. Then all the tech giant email providers subscribe to a DNSBL from SpamHaus or the like, & block all those IPs.

@lightmeter There are a couple websites where you can submit your IP address, and it will cross-check ~30 or so blacklists (including SpamHouse), and give you a report on which DBs your IP is blacklisted on. Can be quite eye-opening for residential users. One of those sites will also monitor the blacklists regularly & email you updates.

@lightmeter BTW, I will not use a relay. That is exactly what the tech giants want to force residential users to do. I will not dance for them for 2 reasons: it supports their bullying, and it exposes all my outbound email traffic to a single centralized point of observation/collection/privacy abuse. I should not have to share every email I send with a 3rd party -- that's far too "big brother"

Totally agreed. User friendly solutions to dynamic IPs can be a challenge though - our tech will help for home-hoster use cases if that issue, and the blocklist you mention, can be solved. Do requests for RBL removal work in these cases, in your experience? Unlocking endless dynamically assigned IPs manually would be tedious.

@lightmeter There is no way for a user to unblock themselves. It's the ISP (not the user) who has a contract with the blacklisting company (e.g. #SpamHaus). SpamHaus listens to ISPs & ignores users. The only leverage a user has is to leave their ISP. But most users don't even know it was their own ISP who blacklisted them (no transparency).

What's the beat workaround for users who dont want to switch ISPs? Tunnelling like #Pagekite?

@lightmeter Using a VPN tunnel will effectively give you a different IP address, and often that IP address is not blacklisted so a user can run their own mail server. So it solves the practical problem but keeping your ISP means you're still patronizing them.

10 Years after setting up my first Sheeva plug Freedombox, its disappointing that's still the best option 😕

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