On Mon, 2019-06-03 at 15:38 -0700, Carl Byington via mailop wrote:
> We can (manually) compensate for errors in dmarc records. For
> example,booking.com has a p=reject, but we see mail "From:
> .*@booking.com" dkimsigned by sg.booking.com. Strict dmarc would
> reject that. We enforce arequirement
On Sat, 2019-04-27 at 15:09 -0400, Bill Cole wrote:
> Yes, because the signature included the Sender and List-* headers,
> probably non-existent originally, which mailing lists typically
> (including this one) add to messages they relay.
>
Like most mailing lists, mailop both modifies the
On Mon, 2019-10-07 at 15:34 +0200, Jaroslaw Rafa via mailop wrote:
> Hello All,
> this is my first post to this list - I just learned about its existence and
> someone told me that maybe it is possible to solve my issue here.
>
> I run my own personal mailserver at rafa.eu.org for quite a few
On Fri, 2020-01-24 at 14:02 +0100, Renaud Allard via mailop wrote:
>
> On 1/24/20 12:28 PM, Jaroslaw Rafa via mailop wrote:
> > In my opinion, "-all" is good only when it is the *only* entry in the SPF
> > record, ie. SPF record indicates that the domain does not send mail *at
> > all*.
> > In
On Fri, 2020-10-16 at 12:51 +, Larry Struckmeyer via mailop wrote:
> Using Outlook thru O365 attempts to reply to a message in this list result
> in the reply being addressed to the address of the person being replied to
> and not the list.
>
>
> What is the correct way to reply to a
On Tue, 2020-08-18 at 14:34 -0700, Carl Byington via mailop wrote:
>
> dhl is asking folks to reject that mail, but sendgrid tries to send it
> anyway.
>
Sendgrid doesn't seem to do any From: address authentication. They're sending
email pretending to be from all kinds of random domains.
I
On Wed, 2020-06-17 at 08:55 -0500, Michael Rathbun via mailop wrote:
> On Wed, 17 Jun 2020 14:00:35 +0100, Tim Bray via mailop w
> rote:
> > Anybody else seeing increase phishing through sendgrid? They look fairly
> > convincing.
>
> General spam (several per week) and phishing, especially some
On Thu, 2020-06-04 at 13:36 +0200, Benoît Panizzon via mailop wrote:
>
> So I guess using only SPF and DMARC with a reject policy will not work
> if the envelope sender and from domain do not align.
Using DMARC p=reject without DKIM is broken anyway. You cannot control
how or where your
On Fri, 2020-07-24 at 12:13 -0400, John Levine via mailop wrote:
> In article <20200724160354.gg9...@ikki.ethgen.ch> you write:
> > I think it might happen that in past hetzner (my hosting provider) ...
>
> Oh, there's your problem. Hetzner's network spews garbage. I don'taccept any
> mail from
On Sun, 2020-12-06 at 14:12 +0100, Hans-Martin Mosner via mailop wrote:
>
> In your experience, where does SPF really help? What are the use cases that I
> don't see in my spam-blocker tunnel vision?
SPF is most useful as a fallback mechanism for DMARC. DKIM checks fail at
least occasionally
On Fri, 2021-05-21 at 15:06 +0300, Mary via mailop wrote:
>
> Hello,
>
> I am seeing a lot of DMARC errors with emails coming from tencent.com, I am
> not sure but based on the opendmarc errors I think these emails are
> forwarded via qq.com and the From domain is replaced from @tencent.com to
>
On Fri, 2021-06-04 at 18:08 -0500, Scott Mutter via mailop wrote:
> On Fri, Jun 4, 2021 at 1:24 PM Michael Peddemors via mailop
> wrote:
> > With apache, you can use modsecurity quite easily, and you can block all
> > azure (and other cloud providers ranges) from certain services like
> >
On Fri, 2021-06-04 at 11:45 -0500, Scott Mutter via mailop wrote:
> Not to hijack this thread and send it off-topic, but I'm also seeing a lot
> of brute force attempts (mostly WordPress login attempts) from various and
> wide-ranging subnets of Microsoft IPs.
>
> Has Microsoft's network been
On Mon, 2021-07-12 at 00:11 +0200, Marcus Hoffmann via mailop wrote:
>
> Someone suggested routing emails to MS and google domains through Amazon
> SES. Would that actually make things better?
I'd suggest a more end-user friendly relay, like Duocircle or Dynu's relay
service, who don't mess
On Mon, 2021-07-05 at 19:42 +0200, Konstantin Filtschew / Qameta via mailop
wrote:
> They are not using postmark.
>
> Received mails from paddle from this addresses:
>
> 2021-06-29 mta214a-ord.mtasv.net [104.245.209.214]
> 2021-06-29 mta216a-ord.mtasv.net [104.245.209.216]
>
On Mon, 2021-02-08 at 14:09 +0100, Ale via mailop wrote:
> > Being "properly configured" these days entails needing many things
> > that you didn't say. Forward-Reverse-DNS, SPF, DKIM, DMARC just for
> > starters. And then more in other places.
>
> > Impossible to know and so impossible to say.
On Thu, 2021-02-25 at 23:15 +, Andrew C Aitchison via mailop wrote:
> On Thu, 25 Feb 2021, Michael Wise via mailop wrote:
> >https://go.microsoft.com/fwlink/?LinkID=614866
>
> Hmm. No indication of how to specify IPv6 addresses.
> Do people think 256 addresses total is reasonable
This may be from Marketo or something? Whois shows Adobe with an
ab...@marketo.com contact address.
Oct 25 10:10:50 hyperion postfix/smtpd[1588023]: connect from
r117.mail.aircanada.com[172.82.216.117]
Oct 25 10:10:51 hyperion postfix/smtpd[1588023]: SSL_accept error from
On Thu, 2021-12-16 at 13:29 -0500, John Levine via mailop wrote:
> It appears that Sam Mulvey via mailop said:
> > I'm looking for advice for a reputable organization that can
> > serve as a
> > net-facing MX for my very small mail server. Feel free to email
> > me
> > off-list with contacts
On Wed, 2022-03-02 at 17:28 +, Simon Arlott via mailop wrote:
> On 2 March 2022 17:12:14 GMT, Edgaras | SENDER via mailop
> wrote:
>
> > There's literally nothing you can do as a sender to prevent your
> > reputation from being trashed.
>
> No, that's quite clearly not literally true. Stop
On Tue, 2022-06-14 at 19:07 +0200, Slavko via mailop wrote:
> Ahoj,
>
> Dňa Tue, 14 Jun 2022 16:51:55 + Ken O'Driscoll via mailop
> napísal:
>
> > I wouldn't suggest that you implement DMARC on your list domain
> > as it
> > won't help with deliverability and will just cause more issues.
>
On Fri, 2022-08-19 at 10:19 -0500, Mike Hammett via mailop wrote:
>
> I wonder: How do other Microsoft Office365 customers mitigate this
> situation?
If O365 no longer meets their needs, I guess maybe they'll have to
use something different. Or change their needs.
On Tue, 2022-09-13 at 09:30 +0100, Laura Atkins via mailop wrote:
>
>
>
> That’s not what I’m seeing at all. What I’m seeing is complaints
> that it’s difficult to host your own email without any real
> commitment of resources (whether those resources be time or money).
> A lot of the
On Tue, 2022-11-29 at 09:15 -0500, Muyeed Ali via mailop wrote:
> -- Got it. Wanted to avoid a self-managed service. But if any
> third-party solution does not work, will try to integrate rspamd
> with Postfix and keep in mind the loop-y behavior.
opendmarc is an easy integration and just needs
On Fri, 2023-06-16 at 18:05 +, Salvatore Jr Walter P via mailop
wrote:
>
>
> Getting reports back from several ISPs like the one below.
> It shows dkim failing for the IP, but successful for the domain?
> The domain “mail-dkim-us-west-2.prod.hydra.sophos.com” uses
> multiple IPs,
> One of
On Tue, 2024-02-06 at 17:46 -0500, John Covici via mailop wrote:
> Hi. I am trying to make sure my mail server is properly
> authenticated, and I have spf and dkim set up -- seemingly
> correctly
> -- but I am not sure about dmarc. I have downloaded and installed
> the
> open-dmarc package and I
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