Re: [mailop] Anyone Here from VirginMedia?

[Davide Migliavacca via mailop]

Hello Tonya,

>Currently connections are set at 1 yet we are still seeing too many 
>simultaneous sessions.  I am hoping to reach someone who can assist further.

not sure this applies to your case, but if you're applying outbound connections 
limits to a destination domain, and the destination MX manages multiple 
domains, you might in fact be opening more than 1 simultaneous concurrent 
connection to that MX.
You count 1 open connection from your MTA to virginmedia.com and 1 to 
ntlworld.com, but they are seeing 2 connections from your IP to their MXs.

Or, your MTA might in fact be exceeding configured limits during specific queue 
conditions.

Both of the above are from direct experience.

HTH
Davide



Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com

From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Tonya Gordon via 
mailop
Sent: Thursday, February 22, 2018 17:10
To: mailop 
Subject: [mailop] Anyone Here from VirginMedia?

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Re: [mailop] Libero.it contact?

[Davide Migliavacca via mailop]

Indeed, they do read the postmaster@ messages, although not necessarily answer 
to any request.

Cheers,
Davide

Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com

-Original Message-
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Luis E. Muñoz via 
mailop
Sent: 22 November 2017 20:09
To: Tim Starr 
Cc: mailop@mailop.org
Subject: Re: [mailop] Libero.it contact?



On 22 Nov 2017, at 10:02, Tim Starr wrote:

My apologies if I've asked this before and forgotten the answer, but is
there a good way to contact Libero.it about one of my ESP clients 
getting
blocked?

A couple years ago I had luck with postmaster@

Best regards

-lem


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Re: [mailop] Hotmail and 4.5.1 4.7.500 Server Busy with some

[Davide Migliavacca via mailop]

I'm starting to open tickets as a business customer of the the Office cloud.
Of course it has absolutely nothing to do with this and will get nothing done - 
but I understand very well the need to build some critical mass of signals that 
a problem needs attention, to get things rolling in a large organization. 
Hopefully, some QA process will correlate tickets.

Thanks for your help!

Davide

Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com

-Original Message-
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Michael Wise via 
mailop
Sent: 10 November 2017 01:05
To: Emre Üst |euro.message| 
Cc: Maarten Oelering ; Benjamin BILLON 
; mailop@mailop.org
Subject: Re: [mailop] Hotmail and 4.5.1 4.7.500 Server Busy with some

 
In retrospect, I suspect the word that best fits is, "Official".
 
I understand the strain on this, and am doing the best I can to get the data in 
front of the right people to get an official response, or at the very least, 
get the issue (whatever it may be) resolved.
 
BTW, somehow this thread has grown sufficently large that all my responses are 
now put in the moderation queue.
 
Aloha,
Michael.
-- 
Michael J Wise
Microsoft Corporation| Spam Analysis
"Your Spam Specimen Has Been Processed."
Got the Junk Mail Reporting Tool 
  ?
 
From: Emre Üst |euro.message| [mailto:emre@euromsg.com] 
Sent: Thursday, November 9, 2017 12:45 PM
To: Michael Wise 
Cc: Maarten Oelering ; Benjamin BILLON 
; mailop@mailop.org
Subject: Re: [mailop] Hotmail and 4.5.1 4.7.500 Server Busy with some
 
Hello Michael , 

Your support team no longer answers the tickets. We still keep getting the 4xx 
error as server busy.

When will a legal explanation come from Hotmail (or Microsoft)? 
Thank you 
 
 
On Fri, Nov 3, 2017 at 10:21 PM, Michael Wise  > wrote:
 
The AS codes are internal IDs, and are not ASNs.
Each one means something different.
Conflating the different codes is pretty much the same as saying, "My 
Mail Was Blocked!"
It's not overly helpful in diagnosing the issue.
 
Again, open a ticket; it's the only wat to get visibility on general 
issues.
 
  https://go.microsoft.com/fwlink/?LinkID=614866 

 
 
Aloha,
Michael.
-- 
Michael J Wise
Microsoft Corporation| Spam Analysis
"Your Spam Specimen Has Been Processed."
Got the Junk Mail Reporting Tool 

  ?
 
From: Maarten Oelering [mailto:maar...@postmastery.net 
 ] 
Sent: Friday, November 3, 2017 12:22 AM
To: Benjamin BILLON  >
Cc: "Emre Üst |euro.message|"  >; mailop@mailop.org  ; 
Michael Wise  >
Subject: Re: [mailop] Hotmail and 4.5.1 4.7.500 Server Busy with some
 
We are seeing this error on specific sender IPs. So “Server busy” may 
be intentionally and dependent on the sender. 
There are also many versions of this error, with at least 6 different 
AS codes. Some occur after MAIL FROM, some occur after RCPT TO, and some occur 
after DATA. 
 
Previously Hotmail said something like “We have limits for how many 
messages can be sent per hour and per day”. Very useful, you knew that 
reputation was the issue.
Now we just see “Server busy” with an internal code, and we have to 
guess what’s wrong. It would be helpful to know more about these AS codes. Or 
at least which ones are sender issues and which ones receiver issues. This will 
also relieve Microsoft support I guess.
 
Maarten Oelering
Postmastery
 
On 3 Nov 2017, at 07:49, Benjamin BILLON via mailop 
 > wrote:
 
Sorry to interrupt, I just have a suggestion that maybe Michael 
could 

Re: [mailop] SENDERSCORE

[Davide Migliavacca via mailop]

Hi Tim,

as others already pointed out, score.senderscore.com will tell you the 
SenderScore reputation scoring, and you want it to be > 90.
If you're looking for their BL instead, use 

nslookup zzz.yyy.xxx.vvv.bl.score.senderscore.com

(notice the "bl" subdomain).
Many RBL checkers have it.

HTH
Davide


Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
http://www.contactlab.com

From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of 
timrutherf...@c4.net
Sent: 24 October 2017 17:24
To: mailop@mailop.org
Subject: [mailop] SENDERSCORE

Hello,

Has anyone else had experience with SenderScore RBL?

I find one of our domains on their blacklist and have addressed the issue that 
presumably got us there, but having difficulty getting any "real" estimates as 
to how long it will take for our IP reputation to recover.   

My understanding is that an NSlookup against a particular zone shows if the IP 
is listed and the last digit indicates the current spam reputation for the 
blacklisted entry

   nslookup zzz.yyy.xxx.vvv.score.senderscore.com   (where vvv.xxx.yyy.zzz 
is the IP you wish to lookup)

(our is currently 58, it was 69 last night) 

Based on that rate of roughly 9 points in 15 hours, it's going to be a long 
week if we need to get to "0".   Does anyone know if that speeds up 
("snowballs") as the reputation improves and/or what threshold it takes to move 
from "poor" to "neutral" ? 

I understand that the whole system is automated and can't be "nudged along", 
but SenderScore's estimate of "a few hours to just over a week" is a bit too 
vague to be of value.   

They also couldn't provide any specifics on the message(s) that triggered the 
block aside from "approximate time of last spam message" - which makes it hard 
to correlate which messages triggered the event. 

We are not on any other blacklists but this one is negatively affecting some of 
our larger customers.  Murphy' s Law.

Thanks,
Tim

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Re: [mailop] SmartScreen filter does not "regroup" email traffic from different IPs

[Davide Migliavacca via mailop]

Hi Mathieu,

seen the same, plus some of the IPs have been blocked (and shown as blocked in 
"View IP Status"), and are still blocked after more than 40 days of complete 
inactivity (no mail whatsoever being sent out), which basically makes me 
suspect some good ol' precious IPv4 addresses have been wasted for good...

Cheers
Davide


Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com

-Original Message-
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Mathieu Marnat
Sent: 18 October 2017 11:43
To: mailop@mailop.org; mai...@bago.org
Subject: [mailop] SmartScreen filter does not "regroup" email traffic from 
different IPs

Hi Stefano, 




I see you and I have had the same experience with Outlook's support : answers 
are based on a scenario that always ends the same way.

I share your issues : IPs that are working well are green on SNDS and other IPs 
that are consecutive and sending the exact same emails get throttled in my 
case... I do not see any logic in this.

Also, I still get some "server busy" messages from Outlook, that was never the 
case before.




Mathieu.







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[mailop] Hotmail and 4.5.1 4.7.500 Server Busy with some ASxxx attached

[Davide Migliavacca via mailop]

Hello,

did anybody get any sensible answer from Hotmail Sender Support about the 

451 4.7.500 Server busy. Please try again later from []. (AS843) 
[.prod.protection.outlook.com]

deferring a large percentage of traffic forever (even a 48 hours limit to 
retries won't help), obviously from DKIM-authenticated transactional messages 
emitted by top-reputation, SNDS-green, no-problem-whatsoever until the suspect 
recent infrastructure switch on their side IPs,
and is willing to share the love you got from them?

Sometimes the AS843 is AS844 instead.

Have a nice day!
Davide

Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com


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Re: [mailop] Blacklist bounces from Laposte

[Davide Migliavacca via mailop]

Hi Daniel, 

seeing this too, same two error messages. 
In our case, relatively lots more of the senderscore variation than Spamhaus.
First seen on Saturday, then larger numbers yesterday, still going on today as 
I'm writing this.

Cheers
Davide

Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com

-Original Message-
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Daniel Baqueiro 
via mailop
Sent: 25 September 2017 18:26
To: mailop@mailop.org
Subject: [mailop] Blacklist bounces from Laposte

Hi Everyone, 

Just wondering if anyone is seeing bounces from Laposte referencing listings in 
Spamhaus and/or Senderscore where there's actually none.


550 5.5.0 Les emails envoyes vers la messagerie Laposte.net ont ete 
bloques par nos services. Afin de regulariser votre situation nous vous 
invitons a cliquer sur le lien ci-dessous et a suivre la procedure. The emails 
sent to the mail host Laposte.net were blocked by our services. To regularize 
your situation please click on the link below and follow the procedure 
https://www.spamhaus.org/lookup/ LPN007_101

550 5.5.0 Les emails envoyes vers la messagerie Laposte.net ont ete 
bloques par nos services. Afin de regulariser votre situation nous vous 
invitons a cliquer sur le lien ci-dessous et a suivre la procedure. The emails 
sent to the mail host Laposte.net were blocked by our services. To regularize 
your situation please click on the link below and follow the procedure 
https://senderscore.org/rtbl/ LPN007_102


We've already asked for support from their postmaster, but wanted to see if 
this is a widespread issue.

Thanks,


Daniel Baqueiro
Deliverability EMEA | GROUPON
daniel.baque...@groupon.com  


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Re: [mailop] DKIM for Exchange - experiences?

[Davide Migliavacca via mailop]

Dear Autumn,

> 
> MailOp friends, might you have any advice to help my colleague and his
> customer?
>

Having Exchange as corporate mail server,  I 100% subscribe to the advice 
already provided by other listmembers: smarthost Exchange with a smaller and 
leaner MTA both ways (outbound and inbound).
And not only for DKIM sake, mind you!

HTH
Davide 

Davide Migliavacca
cto, ContactLab
Tel +39 02 2831181
www.contactlab.com

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