[AusNOG] Outlook 365 Email Issues

[Scott Wilson]

realistically they should be calling it Office 340-ish.

On Wed, 11 Oct 2023 at 21:06, Shane Chrisp <shane at 2000cn.com.au> wrote:

> Just for those who may be wondering what the issue is. This is from
> Microsoft.
>
>
> 11 October 2023 at 12:22 pm AWST
>
> Title: Users are unable to receive external email messages within Exchange
> Online User impact: Users are unable to receive external email messages
> within Exchange Online. Current status: We're investigating a potential
> issue and checking for impact to your organization. We'll provide an update
> within 30 minutes.
>
> 11 October 2023 at 12:52 pm AWST
>
> Title: Users are unable to receive external email messages within Exchange
> Online User impact: Users are unable to receive external email messages
> within Exchange Online. Current status: We're currently reviewing simple
> messages to refine our understanding of this specific impact scenario and
> establish our troubleshooting steps. Scope of impact: Your organization is
> impacted by this event, as well as users who are attempting to receive
> external email messages within Exchange Online. Next update by: Wednesday,
> October 11, 2023 at 2:30 PM GMT+8
>
> 11 October 2023 at 2:33 pm AWST
>
> Title: Users are unable to receive external email messages within Exchange
> Online User impact: Users are unable to receive external email messages
> within Exchange Online. More info: Some users email messages may send;
> however, users may experience delays up to one hour. Current status: Our
> review of simple messages has lead us to a potential root cause where a
> portion of SQL infrastructure may be receiving an unusually large number of
> requests that may be hindering Exchange Online's performance. We're working
> to confirm our findings to cultivate further troubleshooting steps. Scope
> of impact: Your organization is impacted by this event, as well as users
> who are attempting to receive external email messages within Exchange
> Online. Next update by: Wednesday, October 11, 2023 at 4:30 PM GMT+8
>
> 11 October 2023 at 4:59 pm AWST
>
> Title: Some users may encounter delays receiving external email messages
> in Exchange Online User impact: Users may encounter delays receiving
> external email messages in Exchange Online. More info: Affected users may
> see a "451 4.7.500 Server busy" error message. Current status: We’re
> analyzing sample throttling IPs from simple messages to confirm whether the
> issue with the portion of SQL infrastructure is causing impact, before we
> begin formulating a remediation plan. Scope of impact: Impact is specific
> to some users who are served through the affected infrastructure. Next
> update by: Wednesday, October 11, 2023 at 7:00 PM GMT+8
>
> 11 October 2023 at 6:26 pm AWST
>
> Title: Some users may encounter delays receiving external email messages
> in Exchange Online User impact: Users may encounter delays receiving
> external email messages in Exchange Online. More info: Affected users may
> see a "451 4.7.500 Server busy" error message. Current status: We’ve
> identified that specific IP addresses are being unexpectedly limited by our
> anti-spam procedures, causing inbound external email delivery to become
> throttled and delayed. We're reviewing if there have been any recent
> changes to our anti-spam rules to understand why the IP addresses are being
> limited. In the meantime, we're manually adding reported affected IP
> addresses to an allowed list to provide immediate relief. Scope of impact:
> Impact is specific to some users who are served through the affected
> infrastructure. Next update by: Wednesday, October 11, 2023 at 8:30 PM GMT+8
>
> Regards
>
> Shane
>
>
> On 11/10/23 12:28, Max Parsons wrote:
>
> Thanks for the reply Max. Its always good to know that its not just you.
> Hopefully they get it resolved soon.
>
> --
> Regards
>
> Shane Chrisp
> 2000 Computers & Networks Pty Ltd
> U8, 19 Outram St, West Perth, WA 6005
> Ph 08 6298 7391 Fx 08 6298 7393
> Mb 0412 409 856
> Email shane at 2000cn.com.au
> Web http://www.2000cn.com.au
>
>
>
> We are also seeing this. Support let us know there were some issues with
> emails from the Barracuda cloud, but we are on-prem.
>
> 451 4.7.500 Server busy. Please try again later from [103.21.17.178].
> (S77714) [ME3AUS01FT022.eop-AUS01.prod.protection.outlook.com
> 2023-10-11T04:06:47.950Z
>
> The queue is over 4000 emails at the moment.
>
> - Max
>
> On Wed, 11 Oct 2023 at 15:24, Shane Chrisp <shane at 2000cn.com.au> wrote:
>
>> Hi All,
>>
>> Just wondering if others are seeing issues with email for delivery to
>> Outlook 365 queuing up with "4.7.500 Server busy. Please try again
>> later" messages?
>>
>> Our mail queue has been getting progressively larger since about 10am
>> WAST today and of course the MS outage site shows no issues, though some of
>> the down detector sites how others seem to be having issues.
>>
>> --
>> Regards
>>
>> Shane Chrisp
>> 2000 Computers & Networks Pty Ltd
>> U8, 19 Outram St, West Perth, WA 6005
>> Ph 08 6298 7391 Fx 08 6298 7393
>> Mb 0412 409 856
>> Email shane at 2000cn.com.au
>> Web http://www.2000cn.com.au
>>
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>
>
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>
> --
> Regards
>
> Shane Chrisp
> 2000 Computers & Networks Pty Ltd
> U8, 19 Outram St, West Perth, WA 6005
> Ph 08 6298 7391 Fx 08 6298 7393
> Mb 0412 409 856
> Email shane at 2000cn.com.au
> Web http://www.2000cn.com.au
>
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