On 2020-10-27 13:15, Gert Doering wrote:
Hi,
On Tue, Oct 27, 2020 at 01:00:59PM +0100, Jeroen Massar wrote:
Making sure one only egress mail that one is supposed to send
(SPF/DKIM/DMARC/ARC) is the only way to do that and would mean being a
good citizen on the Internet,
Much easier said than
On 2020-10-27 09:04, Gert Doering wrote:
Hi,
On Tue, Oct 27, 2020 at 08:40:39AM +0100, Jeroen Massar wrote:
Mail server admin can do a SPF check (or have a list of allowed source
email domains) before outbound and reject forwarding these emails.
I read this and I wonder "which of the MTAs
Hi,
On Tue, Oct 27, 2020 at 01:00:59PM +0100, Jeroen Massar wrote:
> Making sure one only egress mail that one is supposed to send
> (SPF/DKIM/DMARC/ARC) is the only way to do that and would mean being a
> good citizen on the Internet,
Much easier said than done...
> which is why lists like
On 2020-10-27 08:01, Silvan M. Gebhardt wrote:
I assume this swiss provider has never allowed any customer to leave.
Every customer who changes DNS providers becuase their marketing decides on a
new website and not telling anyone and then their marketing department
hijacking the DNS, and
On 2020-10-27 00:01, Mueller Urs SBB CFF FFS wrote:
Thank you guys
well, technically, they (UCEProtect) are correct.
If an IP sends a mail with the From: header indicating a domain for
which an SPF record exists, and the sending IP is not supposed to send
it, then it is a misconfiguration
> well, technically, they (UCEProtect) are correct.
Sure, if I shoehorn my own rules, I can almost guarantee that _I_ will be
compliant.
That doesn't make them any more relevant though.
> If an IP sends a mail with the From: header indicating a domain for
> which an SPF record exists, and
> Mail server admin can do a SPF check (or have a list of allowed source
> email domains) before outbound and reject forwarding these emails.
You can check this before you allow the domain to be sent. However, I don't
know of any mail server/MTA that can do this out-of-the-box. And note also:
Hi,
On Tue, Oct 27, 2020 at 08:40:39AM +0100, Jeroen Massar wrote:
> Mail server admin can do a SPF check (or have a list of allowed source
> email domains) before outbound and reject forwarding these emails.
I read this and I wonder "which of the MTAs out there can do that" -
that is, check
I assume this swiss provider has never allowed any customer to leave.
Every customer who changes DNS providers becuase their marketing decides on a
new website and not telling anyone and then their marketing department
hijacking the DNS, and forgetting that they run some mailing via some
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