Is anyone else seeing mismatched RDNS records at some
outbound.protection.outlook.com senders?
For example:
$ host 104.47.0.53
53.0.47.104.in-addr.arpa domain name pointer
mail-he1eur01on2053.outbound.protection.outlook.com.
$ host mail-he1eur01on2053.outbound.protection.outlook.com.
mail-he1eur
On 23/08/2021 17:16, Neil Youngman wrote:
Is anybody else seeing issues with some Microsoft RDNS failing
intermittently. I'm seeing RDNS failures in our Exim logs, but when I
check the IPs from the command line, there are no obvious issues and it
isn't affecting all our traffic from Microsoft.
On 23/08/2021 18:06, Al Iverson wrote:
Here's an odd question. Do you use Google Public DNS or your own
resolvers? I was indeed running into random, unexpected rDNS failures
using Google Public DNS 8.8.8.8/8.8.4.4 yesterday. I haven't poked at
it again today to see if it's still happening.
We u
Is anybody else seeing issues with some Microsoft RDNS failing
intermittently. I'm seeing RDNS failures in our Exim logs, but when I
check the IPs from the command line, there are no obvious issues and it
isn't affecting all our traffic from Microsoft.
It seems t have started a little before midn
On 21/04/2021 11:00, Chris wrote:
> Aside from the possibility that the message is simply wrong, or the
> implementation broken, is your mail server acting like most other
> servers when presented with a failure (soft or hard)?
>
> Your posting seems to be that you give up after the second try.
>
On 20/04/2021 11:00, Hans-Martin Mosner wrote:
>> Normally I would expect the retries to pass greylisting. Does anyone have
>> any insight into why this is not behaving as expected? The destination is
>> exeter.ac.uk.
>>
>> Neil Youngman
> The exeter.ac.uk postmaster is probably the only one who ca
I have observed that messages from our system are temporarily rejected
as greylisted by one destination but they are never accepted on retry.
The response is logged as "DATA: 451 0.0.0 1 recipients being greylisted
for 5 minutes". We retry after 10 minutes and get the same response.
Normally I wou
> On Fri, Oct 30, 2020 at 1:11 AM Atro Tossavainen via mailop <
mailop@mailop.org> wrote:
Why does Google bounce after accepting a message? At Google's scale,
the potential to become the world's biggest spammer simply through
backscatter is enormous.
What do you prefer they do with that ema
This morning I am seeing issues caused by Messagelabs sending emails
with mismatched RDNS. For example 46.226.52.1 is identified as
mail1.bemta25.messagelabs.com. in RDNS, but a forward lookup of
mail1.bemta25.messagelabs.com. gives a number of addresses starting
195.245.230
Neil Youngman
On 04/10/2019 12:34, Sebastian Kluth wrote:
Hi Neil, hi all,
„Eventually I was asked for permission to pass the email to the ESP as part of
the investigation. Although I wasn't confident that any positive action would
be taken, I expected that the emails would finally stop and that I would ge
On 03/10/2019 10:07, Alessandro Vesely wrote:
On Thu 03/Oct/2019 09:46:35 +0200 Neil Youngman via mailop wrote:
On 23rd March, I looked into their data protection details. The
contact was the same customer care email that was failing to resolve
the issue.
Looking at the email headers, I saw
In January I decided to unsubscribe from the Thompson and Morgan
mailing lists. Thompson and Morgan are a well known supplier of seeds
and plants in the UK. I have bought from them twice in the last 2 or 3
years, but I felt that getting at least one email a day, sometimes
more from a company I only
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