Hi Niels,

On Sun, Aug 06, 2017 at 07:19:04PM +0200, Niels Kobschätzki wrote:
> > On 6. Aug 2017, at 18:40, Walter Alejandro Iglesias <w...@roquesor.com> 
> > wrote:
> > 
> >> On Sun, Aug 06, 2017 at 06:02:25PM +0200, Jesper Wallin wrote:
> >> Like Martijn pointed out, you're sending mail from a IP which is not
> >> intended for mail-servers.
> > 
> > This was my main question.  What is an "IP intended for mail-servers"?
> The question should be "what are IPs **not** intended for mail-servers?"
> The ranges of ISPs for home-users and the dsl-, cable-, whatever-connection 
> are well-known and pretty much on all of the blacklists since the only thing 
> you can usually expect from them is spam from botnets. Legitimate mails are 
> rather rare from those ranges, thus they get blocked. 

I cannot tell what happens in pratice, I've never run a big mail server.
But the reasons that come to my mind someone wants to run their own
server (at home or at a small enterprise) are opposed to what you state.
Why would you want to send spam from the fixed IP you're paying for (in
my case 5 euros mouth)?

The question is still unanswered.  What determines those "ranges", who
regulates that?

> To not get blocked by google and hotmail you need an IP from some
> hosting-provider, university or something like this;

Which is the procedure followed by those entities to get an IP in what
you called the "authorized range"?  Authorized by who?

> a PTR-record for your server

I already have this.

> and at least an SPF-, even better a DKIM-record.

I had these at first and removed them after seeing they don't help.

> And if you
> ever send out mail, you maybe want a secondary IP for temporary
> failover-cases if you land  temporarily on a black list.

I have just two personal addresses.  I don't need that complication.  :-)

> Niels

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