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 protected]
Webhttp://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
<http://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 <[email protected]> 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 protected]
Webhttp://www.2000cn.com.au
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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 protected]
Webhttp://www.2000cn.com.au
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AusNOG mailing list
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