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Re: OT: What do you need to do nowadays to get mail delivered to your mail server?

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On 18/11/2025 11.04, Marco Moock wrote:
> On 18.11.2025 10:07 Uhr J.O. Aho wrote:
> 
>> I'm sorry that this is off subject and do not have anything thing to
>> do with sendmail specifically, but more of a general question as I
>> have noticed that I do not get mail from all domains, looking at the
>> firewall logs, I can say the remote side do not even try to connect
>> to the server.
> 
> Does it affect only special sites?

It seems to affect some domains, not all, for example general gmail 
works fine, while I have encountered issues with hosted domain, but the 
issue may not be on the google part as they also have a bunch of 
ip-numbers from where they can send too.

> Can you reach the sending server using ping etc.?

I have tried some of the ip's for a domain and there is a SMTP 
responding, so don't seem to be connectivity issue. None of the 
ip-ranges been blocked in my firewall (at the moment it's quite empty as 
I originally suspected it to be the issue).


> Make sure networking works. If the AS includes a RIPE Atlas probe, try
> this to check if that can reach your mailserver.

I did create an account and run a traceroute test, 98 failed and 2 
wasn't run, all seems to end at the same server on Austria, the route 
back from my mail server do take another path. I didn't try ping as by 
default the setup do not respond on ping.

for me it looked like many of the sources that RIPE uses seems to be in 
the same ip-range and same gateway, of course I haven't checked every 
instance, but I was trying to check a handful from different countries.


>> I have done all I know of, SPF, DMARC, DKIM, but is there something
>> new that is required nowadays?
> 
> For a sender, your DNS SPF/DMARC/DKIM records are irrelevant.
> They try to send you the mail and unless you reject it, they are done.

Yeah, you are right about that, was just thinking is there suddenly had 
appeared a reverse mechanism, just been a bit "disconnected" lately.

-- 
  //Aho

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Thread

OT: What do you need to do nowadays to get mail delivered to your mail server? "J.O. Aho" <user@example.net> - 2025-11-18 10:07 +0100
  Re: OT: What do you need to do nowadays to get mail delivered to your mail server? Marco Moock <mm@dorfdsl.de> - 2025-11-18 11:04 +0100
    Re: OT: What do you need to do nowadays to get mail delivered to your mail server? "J.O. Aho" <user@example.net> - 2025-11-18 14:46 +0100
      Re: OT: What do you need to do nowadays to get mail delivered to your mail server? Marco Moock <mm@dorfdsl.de> - 2025-11-18 16:22 +0100
        Re: OT: What do you need to do nowadays to get mail delivered to your mail server? "J.O. Aho" <user@example.net> - 2025-12-17 11:29 +0100
          Re: OT: What do you need to do nowadays to get mail delivered to your mail server? Marco Moock <mm@dorfdsl.de> - 2025-12-17 12:34 +0100

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