Re: [mailop] Weird problems with mitigation at Hotmail/Outlook

[Brian Curry]

What might be going on there is MSFT lifts the “block” but doesn’t change any 
thresholds/limits the IP is still susceptible to.

You may want to prompt the robots to give you the “new IP space” form to 
provide expected volumes from the IP, and see if MSFT will adjust thresholds on 
the IP. That has worked in the past for me, along with the mitigation.


Brian Curry
Email Deliverability Team Lead | Platform Services
Merkle Inc.

From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of John Possidente
Sent: Friday, January 05, 2018 7:41 AM
To: Edgaras | SENDER 
Cc: mailop 
Subject: Re: [mailop] Weird problems with mitigation at Hotmail/Outlook

Seen this also recently (past couple of weeks at least). "Block has been 
lifted" and then it's not.
John

On Fri, Jan 5, 2018 at 6:29 AM, Edgaras | SENDER 
> wrote:
Hi,

2 days ago one of our IPs started getting an AS3150 block when sending to 
Hotmail/Outlook.
Which is very weird, as complaint rate and bounce rate are way below what 
Outlook publishes as their official requirements.

After submitting their delivery support form, we get the automatic email saying 
that the IP has been mitigated: "Our investigation has determined that the 
above IP(s) qualify for mitigation. The block has been lifted, and the IP(s) 
have been granted increased daily sending limits."

However, the IP still stays blocked! After replying to that email, we get a 
copy-paste reply from Outlook.com support saying that "As previously stated, 
your IP(s) do not qualify for mitigation at this time."

???

Alright, we repeat the process the next day, with the same results - initial 
email says that the IP has been mitigated, that doesn't work and the IP is 
still blocked, and Outlook.com support says that the IP is not eligible for 
mitigation.

Asking to escalate to T3 did nothing.

Has someone else experienced this? What to do in this situation?

P.S. if anyone from Outlook/Hotmail are here, here is the ticket number: 
SRX1410467394ID. I would greatly appreciate any help or insight into this.





Regards,

[Sender]

Edgaras Vaitkevičius
edga...@sender.net
+370 627 60923


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Re: [mailop] Weird problems with mitigation at Hotmail/Outlook

[John Possidente]

Seen this also recently (past couple of weeks at least). "Block has been
lifted" and then it's not.

John


On Fri, Jan 5, 2018 at 6:29 AM, Edgaras | SENDER  wrote:

> Hi,
>
> 2 days ago one of our IPs started getting an AS3150 block when sending to
> Hotmail/Outlook.
> Which is very weird, as complaint rate and bounce rate are way below what
> Outlook publishes as their official requirements.
>
> After submitting their delivery support form, we get the automatic email
> saying that the IP has been mitigated: "Our investigation has determined
> that the above IP(s) qualify for mitigation. The block has been lifted, and
> the IP(s) have been granted increased daily sending limits."
>
> However, the IP still stays blocked! After replying to that email, we get
> a copy-paste reply from Outlook.com support saying that "As previously
> stated, your IP(s) do not qualify for mitigation at this time."
>
> ???
>
> Alright, we repeat the process the next day, with the same results -
> initial email says that the IP has been mitigated, that doesn't work and
> the IP is still blocked, and Outlook.com support says that the IP is not
> eligible for mitigation.
>
> Asking to escalate to T3 did nothing.
>
> Has someone else experienced this? What to do in this situation?
>
> P.S. if anyone from Outlook/Hotmail are here, here is the ticket number:
> SRX1410467394ID. I would greatly appreciate any help or insight into this.
>
>
>
>
>
> Regards,
>
> [image: Sender] Edgaras Vaitkevičius
> edga...@sender.net
> +370 627 60923 <+370%20627%2060923>
>
>
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>
>
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[mailop] Weird problems with mitigation at Hotmail/Outlook

[Edgaras | SENDER]

Hi,

2 days ago one of our IPs started getting an AS3150 block when sending to
Hotmail/Outlook.
Which is very weird, as complaint rate and bounce rate are way below what
Outlook publishes as their official requirements.

After submitting their delivery support form, we get the automatic email
saying that the IP has been mitigated: "Our investigation has determined
that the above IP(s) qualify for mitigation. The block has been lifted, and
the IP(s) have been granted increased daily sending limits."

However, the IP still stays blocked! After replying to that email, we get a
copy-paste reply from Outlook.com support saying that "As previously
stated, your IP(s) do not qualify for mitigation at this time."

???

Alright, we repeat the process the next day, with the same results -
initial email says that the IP has been mitigated, that doesn't work and
the IP is still blocked, and Outlook.com support says that the IP is not
eligible for mitigation.

Asking to escalate to T3 did nothing.

Has someone else experienced this? What to do in this situation?

P.S. if anyone from Outlook/Hotmail are here, here is the ticket number:
SRX1410467394ID. I would greatly appreciate any help or insight into this.





Regards,

[image: Sender] Edgaras Vaitkevičius
edga...@sender.net
+370 627 60923
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Re: [mailop] Anyone else seeing "451 4.7.500 Server busy" from Hotmail?

[David Hofstee]

Hi Frank,

The AS values are internal Microsoft codes, unknown to most here. They seem
to be failrly consistent. Microsoft changed their server platform a few
months back. Not everything, such as "when do you see X" is clear yet.

The server may be busy (for the level of reputation of the sending IP etc
etc). I notice different behavior for different customers (on dedicated
IPs). Some handle 90k per hour without any deferrals, others get these
deferrals and get to 30k/IP/hr. Same customer, same moment in time,
different brand domain sender.

You are supposed to "ease off" on the sending rate when you see this too
often. Not sure what the exact specs for "ease off" and "too often" are
(and where the "ease on" part starts).

Yours,


David

On 5 January 2018 at 04:28,  wrote:

> Starting just after 9 pm (U.S. Central) we started seeing a little:
> ubad=14039790, Site (hotmail.com/104.47.10.33) said: 451 4.7.500
> Server busy. Please try again later from [96.31.0.20]. (AS761)
> [DB5EUR03FT004.eop-EUR03.prod.protection.outlook.com]
> ubad=14039790, Site (hotmail.com/104.47.33.33) said: 451 4.7.500
> Server busy. Please try again later from [96.31.0.20]. (AS843)
> [BN3NAM01FT051.eop-nam01.prod.protection.outlook.com]
>
> Target IPs are 104.47.10.33, 104.47.32.33, and 104.47.33.33.
>
> Anyone else see this, or know what Hotmail's antispam (AS) values mean?
>
> Regards,
>
> Frank Bulk
>
>
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