RE: EMail server gets blocked by Microsoft

[Jean St-Laurent via NANOG]

I just unlocked ddostest.me with this tool for outlook.com, Hotmail.com, 
msn.com and maybe all the O365 suite.

 

It was fix in less than 24 hours.

 

Thanks for the tip

Jean

 

From: NANOG  On Behalf Of Mike Hammett
Sent: April 28, 2021 7:52 AM
To: Michael Fallen 
Cc: nanog@nanog.org
Subject: Re: EMail server gets blocked by Microsoft

 

Neither Microsoft nor Google have been successful at making tools that work for 
low-volume mailers. They seem to think that if you're not in their club, you're 
either a commercial email marketing firm or SPAM.



-
Mike Hammett
 <http://www.ics-il.com/> Intelligent Computing Solutions
 <https://www.facebook.com/ICSIL>  
<https://plus.google.com/+IntelligentComputingSolutionsDeKalb>  
<https://www.linkedin.com/company/intelligent-computing-solutions>  
<https://twitter.com/ICSIL> 
 <http://www.midwest-ix.com/> Midwest Internet Exchange
 <https://www.facebook.com/mdwestix>  
<https://www.linkedin.com/company/midwest-internet-exchange>  
<https://twitter.com/mdwestix> 
 <http://www.thebrotherswisp.com/> The Brothers WISP
 <https://www.facebook.com/thebrotherswisp>  
<https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> 

  _  

From: "Michael Fallen" 
To: "Dominque Roux" 
Cc: nanog@nanog.org
Sent: Tuesday, April 27, 2021 9:22:29 AM
Subject: Re: EMail server gets blocked by Microsoft

Microsoft seems to be one of the worst offenders in terms of having a 
email blocking blackbox. Good luck getting in contact with someone as 
well. Throughout the years of self-hosting email they have always been 
the most problematic of the large providers.

--
Mike

Dominque Roux wrote on 2021-04-27 3:35 AM:
> Hi All,
>
> is there anyone out there who has some experience with the blocking
> mechanism of Microsofts mail server? We're running a mail server at our
> company which ends up on their blacklist from time to time and we're
> wondering if there are some steps we could take in order to prevent this.
>
> Cheers,
> Dominique

 

Re: EMail server gets blocked by Microsoft

[Mike Hammett]

Neither Microsoft nor Google have been successful at making tools that work for 
low-volume mailers. They seem to think that if you're not in their club, you're 
either a commercial email marketing firm or SPAM. 




- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

- Original Message -

From: "Michael Fallen"  
To: "Dominque Roux"  
Cc: nanog@nanog.org 
Sent: Tuesday, April 27, 2021 9:22:29 AM 
Subject: Re: EMail server gets blocked by Microsoft 

Microsoft seems to be one of the worst offenders in terms of having a 
email blocking blackbox. Good luck getting in contact with someone as 
well. Throughout the years of self-hosting email they have always been 
the most problematic of the large providers. 

-- 
Mike 

Dominque Roux wrote on 2021-04-27 3:35 AM: 
> Hi All, 
> 
> is there anyone out there who has some experience with the blocking 
> mechanism of Microsofts mail server? We're running a mail server at our 
> company which ends up on their blacklist from time to time and we're 
> wondering if there are some steps we could take in order to prevent this. 
> 
> Cheers, 
> Dominique 

Re: EMail server gets blocked by Microsoft

[Jim Popovitch via NANOG]

On Wed, 2021-04-28 at 09:30 +0200, Markus wrote:
> Am 27.04.2021 um 16:46 schrieb Brian Turnbow via NANOG:
> > Hi Dominque,
> > 
> > And sign up for snds
> > 
> > https://sendersupport.olc.protection.outlook.com/snds/index.aspx 
> > 
> > 
> > It will give you the status of your IPs and  you can get jenkmail 
> > reports etc.
> 
> That shit doesn't even work. Just tried. First, you HAVE TO create a 
> Microsoft account to access it. Then, solve some riddles. Enter the IP 
> range you're responsible for. Receive an E-Mail containing a 
> confirmation link which you must click on, and if you do, you get: 
> "Unknown authorization request ID". (Yeah, c doesn't work either) And 
> that's it. And you just wasted 5 minutes of your life. So typical.

ProTip: Click "Access Control" on the left hand side of the page after
you get the "Unknown authorization request ID" error.  :)

-Jim P.

Re: EMail server gets blocked by Microsoft

[Markus]

Am 27.04.2021 um 16:46 schrieb Brian Turnbow via NANOG:

Hi Dominque,

And sign up for snds

https://sendersupport.olc.protection.outlook.com/snds/index.aspx 



It will give you the status of your IPs and  you can get jenkmail 
reports etc.


That shit doesn't even work. Just tried. First, you HAVE TO create a 
Microsoft account to access it. Then, solve some riddles. Enter the IP 
range you're responsible for. Receive an E-Mail containing a 
confirmation link which you must click on, and if you do, you get: 
"Unknown authorization request ID". (Yeah, c doesn't work either) And 
that's it. And you just wasted 5 minutes of your life. So typical.

Re: EMail server gets blocked by Microsoft

[Richard]

> Date: Tuesday, April 27, 2021 09:35:35 +0200
> From: Dominque Roux 
>
> is there anyone out there who has some experience with the blocking
> mechanism of Microsofts mail server? We're running a mail server at
> our company which ends up on their blacklist from time to time and
> we're wondering if there are some steps we could take in order to
> prevent this.

You may want to join the mailop mailing list:

   List-Archive: 
   List-Post: 
   List-Subscribe: ,


and ask there as it seems more applicable to that list, and is a
common topic of discussion there.

Re: EMail server gets blocked by Microsoft

[Michael Fallen]

Microsoft seems to be one of the worst offenders in terms of having a 
email blocking blackbox. Good luck getting in contact with someone as 
well. Throughout the years of self-hosting email they have always been 
the most problematic of the large providers.


--
Mike

Dominque Roux wrote on 2021-04-27 3:35 AM:

Hi All,

is there anyone out there who has some experience with the blocking
mechanism of Microsofts mail server? We're running a mail server at our
company which ends up on their blacklist from time to time and we're
wondering if there are some steps we could take in order to prevent this.

Cheers,
Dominique

RE: EMail server gets blocked by Microsoft

[yasuo]

Hi Dominuque,

If you mean "Microsoft 365" mail servers, your mail server is quite possibly 
listed frequently on Spamhaus' blocklists.
https://www.spamhaus.org/

Check back with Spamhaus on your reputation to find out what you can do.

Cheers,
跡部 靖夫 (ATOBE, Yasuo)
ya...@atobe.com

-Original Message-
From: NANOG  On Behalf Of Dominque Roux
Sent: Tuesday, April 27, 2021 4:36 PM
To: nanog@nanog.org
Subject: EMail server gets blocked by Microsoft

Hi All,

is there anyone out there who has some experience with the blocking mechanism 
of Microsofts mail server? We're running a mail server at our company which 
ends up on their blacklist from time to time and we're wondering if there are 
some steps we could take in order to prevent this.

Cheers,
Dominique

RE: EMail server gets blocked by Microsoft

[Brian Turnbow via NANOG]

Hi Dominque,

And sign up for snds
https://sendersupport.olc.protection.outlook.com/snds/index.aspx

It will give you the status of your IPs and  you can get jenkmail reports etc.

Brian

From: NANOG  On Behalf Of Mel Beckman
Sent: Tuesday, April 27, 2021 4:19 PM
To: Dominque Roux 
Cc: nanog@nanog.org
Subject: Re: EMail server gets blocked by Microsoft

Dominque,

Have you read this Microsoft guidance on email servers? It covers the most 
common problems, such as missing SPF records, incorrect or missing IN-ADDR DNS, 
etc:

https://sendersupport.olc.protection.outlook.com/pm/troubleshooting.aspx



 -mel beckman


On Apr 27, 2021, at 6:54 AM, Dominque Roux 
mailto:dominique.r...@ungleich.ch>> wrote:
Hi All,

is there anyone out there who has some experience with the blocking
mechanism of Microsofts mail server? We're running a mail server at our
company which ends up on their blacklist from time to time and we're
wondering if there are some steps we could take in order to prevent this.

Cheers,
Dominique

Re: EMail server gets blocked by Microsoft

[Mel Beckman]

Dominque,

Have you read this Microsoft guidance on email servers? It covers the most 
common problems, such as missing SPF records, incorrect or missing IN-ADDR DNS, 
etc:

https://sendersupport.olc.protection.outlook.com/pm/troubleshooting.aspx



 -mel beckman

On Apr 27, 2021, at 6:54 AM, Dominque Roux  wrote:

Hi All,

is there anyone out there who has some experience with the blocking
mechanism of Microsofts mail server? We're running a mail server at our
company which ends up on their blacklist from time to time and we're
wondering if there are some steps we could take in order to prevent this.

Cheers,
Dominique