I see a very small amount of these throughout our logs for the past few
days (<10). A bit more today, mostly centered around 19:40-19:44 UTC, but
it is a very small fraction of our mail that hour (~42 of 47087). Nothing
since. For us, they cleared almost immediately on a retry, so I'm inclined
to s
I see something similar looking at our logs. At this moment, that
particular IP you gave seems to be closing the connection on us every time.
However, looking at yesterday's logs, that IP has accepted mail before, and
looking at the past 10 days, I see instances in each log of the connection
closin
On Sat, Mar 23, 2024 at 3:32 PM Matus UHLAR - fantomas via mailop <
mailop@mailop.org> wrote:
>
> I am curious how do people configure hosts that send mail.
>
> For years I recommended using separate IP address (if possible) to send
> mail
> from such servers directly, so one host getting listed i
Everything looks fine from our end on the US east coast, sending to
outlook.com & european TLD variants.
On Tue, May 7, 2024 at 1:29 PM Jarland Donnell via mailop
wrote:
> Hoping it’s not just me, looking for a sanity check. Our queues today
> are packed with these responses from Microsoft’s mai
I see what you are describing on a primary MX of mine, same IP address
connecting multiple times roughly every hour.
May 29 22:31:44 irys postfix/submission/smtpd[444857]: warning: hostname
scanner-401.hk2.censys-scanner.com does not resolve to address 199.45.154.4:
Name or service not known
May 2
I have heard of domains that were quite popular for spamming like xyz/info
being outright blocked. My domain is completely blocked by Comcast without
having ever successfully sent mail to them. I'm guessing in that case it is
the TLD, as the domain had been registered for a couple years or so befor
Which I can understand, I obviously might not like it as a legitimate user
of the TLD, but sometimes a measure like that could be the most effective
mitigation (especially for smaller scale ops). What I did have a problem
with was both the fact that the message was generic ("sender rejected"),
whic
rom the blocked side.
On Wed, Mar 22, 2023 at 3:01 PM John Levine wrote:
> It appears that Frost The Fox via mailop said:
> >-=-=-=-=-=-
> >-=-=-=-=-=-
> >
> >Which I can understand, I obviously might not like it as a legitimate user
> >of the TLD, but sometimes
Typo, or am I missing something? You've got asalesforce.com instead of
salesforce.com there, and indeed smtp.secureserver.net is the MX for that
domain. Actual SF has Proofpoint MXs.
On Mon, Apr 3, 2023 at 2:45 PM Jay Hennigan via mailop
wrote:
> Trying to report spam from their network, got thi
I also show no data for the 6th, but no blocking here (granted, we are a
very high traffic single IP sender).
On Thu, Apr 13, 2023 at 11:33 AM Fernando MM via mailop
wrote:
> Hi,
>
> On Apr 06 we detected that 28 IPs were blocked in Outlook.com, all with
> the following error:
>
> 550 5.7.1 Unfo
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