Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
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E-Mail sending to Offcie/Microsoft365 customers not possible - 451 4.7.500 Server busy
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 86%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EK%3C/text%3E%3C/svg%3E)
Koes
360
Reputation points
Hi,
since this morning 5 am we are not able to send E-mails to office365/Microsoft365 Customers. Our Mails are stuck in our own queue and get the response: host customername.mail.protection.outlook.com 451 4.7.500 Server busy please try again later wit 193.228.149.133 S77719
Can someone check, why we are on an throtteling list with our E-MailServer and remove please?
Exchange Online
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Koes 360 Reputation points
2023-10-11T10:47:21.94+00:00 Problem seems to be known to Microsoft Exchange Online Team,
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 2:30 PM GMT+2
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(188.79999999999998, 40%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
Alexander Shvedko 50 Reputation points2023-10-11T11:07:38.01+00:00 Is there a form in Microsoft where you can send a request and your IP addresses so that they can be added to the exception?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 13%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDB%3C/text%3E%3C/svg%3E)
Didier BIBAL 10 Reputation points2023-10-11T11:21:39.45+00:00 We v got the same issue since this morning
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 52%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDK%3C/text%3E%3C/svg%3E)
Dror Katz 10 Reputation points2023-10-11T11:30:16.3733333+00:00 Hi, any good news, we also have the problem from today.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 43%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGD%3C/text%3E%3C/svg%3E)
Gillis Dirk 20 Reputation points2023-10-11T11:40:55.75+00:00 We have the problem in Belgium but not in Germany.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 14.000000000000002%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3E0%3C/text%3E%3C/svg%3E)
04449962 5 Reputation points2023-10-11T11:55:43.46+00:00 Update 16:06 GMT +2
Answer to my ticket:Please note we have run a backend diagnostic related to the issue, and it will take some time to come into effect. So, we would request to kindly check and confirm the behavior.
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We're experiencing the same issue in Greece. I opened a support ticket this morning, but there's no solution yet. Changing our server's IP allows us to send emails to Exchange Online temporarily. We're informing our customers that this problem is not on our end but rather with Microsoft.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 24%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFL%3C/text%3E%3C/svg%3E)
Freddie Leeman 5 Reputation points2023-10-11T11:56:10.9733333+00:00 The same issue is occurring in the Netherlands. The email queue is reaching 1500 messages, causing a significant backlog. :(
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(163.2, 74%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETK%3C/text%3E%3C/svg%3E)
TN Krishnamurthy 0 Reputation points2023-10-11T12:02:14.49+00:00 We are facing the same problem,. Our Server also receives the message wither "Server Busy" or "Too many recipients" Can any one give the details of the form for informing our IP address and requesting them to add
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 40%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPB%3C/text%3E%3C/svg%3E)
Perger Balázs 5 Reputation points2023-10-11T12:08:18.6966667+00:00 We have the same problem in Hungary. Does anyone know where I can request IP removal? Thx!
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 57.99999999999999%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESA%3C/text%3E%3C/svg%3E)
Staff Ancara 0 Reputation points2023-10-11T12:11:59.8633333+00:00 Hello, same issue here, Italy. We obtain "Server Busy" or "Too many recipients" sending to Microsoft mailservers.Also changing sending IP address with an already warmed IP address not solve the issue.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 99%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAR%3C/text%3E%3C/svg%3E)
Ajay Rooplall 15 Reputation points2023-10-11T12:14:53.0966667+00:00 We are also having this issue in South Africa.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(198.4, 26%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPN%3C/text%3E%3C/svg%3E)
Peter Ny 5 Reputation points2023-10-11T12:17:32.7666667+00:00 Does anyone know where I can request IP removal?
If it is blacklisting... But if not? Does anyone know anything about this? -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 72%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAI%3C/text%3E%3C/svg%3E)
Administrateur IAF (Fournisseur) 1 Reputation point2023-10-11T12:22:34.3833333+00:00 We have the same problem here in France. Our 5 servers with different IPs are affected.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(278.4, 48%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
Mathieu Morier 0 Reputation points2023-10-11T12:55:23.6933333+00:00 We have the problem in Canada ( EAST Region )
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 64%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENU%3C/text%3E%3C/svg%3E)
Nefise Uçar [Erdemir] 0 Reputation points2023-10-11T13:08:43.5766667+00:00 We're experiencing the same issue in Turkiye.
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Perger Balázs 5 Reputation points
2023-10-11T13:17:57.72+00:00 @outlook.com
Please allow IP address 62.100.224.108Thank you!
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Anonymous2023-10-11T13:21:04.8433333+00:00 In Poland we have the same problem
Please add to Whitelist
194.213.1.14
194.213.1.29
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Koes 360 Reputation points
2023-10-11T13:21:48.19+00:00 actually, i think, noone from exchange online team is reading here :(
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Alexander Shvedko 50 Reputation points
2023-10-11T13:23:07.3566667+00:00 Please add to whitlelist:-
unma.unistaff.com
37.230.155.10
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(163.2, 49%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBM%3C/text%3E%3C/svg%3E)
Bilal Ümit 0 Reputation points2023-10-11T13:26:31.8866667+00:00 Same problem in Turkey/Türkiye
212.252.192.101
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 2%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
Bassam Shahtoot 0 Reputation points2023-10-11T13:31:21.5866667+00:00 Hi, I have a problem also in this IP:
212.29.201.108 -
Anonymous
2023-10-11T13:46:33.4+00:00 Hello dear Supportteam,
our IP is also affected:
[IP removed from comment]
Edit: it is now the next morning and the problem seems to be resolved
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(9.6, 13%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESJ%3C/text%3E%3C/svg%3E)
SALAZAR Joaquim 0 Reputation points2023-10-11T13:48:40.5933333+00:00 Same problem in Switzerland.
Any light about a possible solution? -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 40%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWB%3C/text%3E%3C/svg%3E)
WBS Blank Software 0 Reputation points2023-10-11T13:50:55.5133333+00:00 In the meantime, we're manually adding reported affected IP addresses to an allowed list to provide immediate relief.
@outlook.com , please allow this affected IP to your whitelist:
80.154.9.145
Thanks -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(6.4, 49%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJS%3C/text%3E%3C/svg%3E)
Jeff Straley 0 Reputation points2023-10-11T13:59:51.2833333+00:00 PLEASE ADD OUR PUBLIC IP: 216.68.72.94
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(89.60000000000001, 79%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPV%3C/text%3E%3C/svg%3E)
Pedro Valmor 0 Reputation points2023-10-11T14:01:21.8166667+00:00 We are facing the same issue in Brazil.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(294.40000000000003, 27%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
Craig 0 Reputation points2023-10-11T14:05:06.8166667+00:00 Same here in Ontario. Can I get our Company Whitelisted Please.
721.14.166.196
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 95%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAC%3C/text%3E%3C/svg%3E)
Alexandre Chaves Fonceca 0 Reputation points2023-10-11T14:19:30.1333333+00:00 Hi,
we have the same problem, hundreds of emails in queue already, in 187.103.208.3 and 187.49.32.4 servers...
please, whitelist them!
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(272, 27%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EH%3C/text%3E%3C/svg%3E)
Houssem 0 Reputation points2023-10-11T14:27:51.3733333+00:00 Hi
We are facing the same Errors in Tunisia
@outlook.com , please allow these affected IPs to your whitelist:
196.224.96.6
196.224.96.4
197.26.11.132
197.26.11.133
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(73.60000000000001, 31%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWK%3C/text%3E%3C/svg%3E)
Wojciech Kunda 0 Reputation points2023-10-11T14:38:26.07+00:00 Problem since morning observed in Poland. No reaction on ticket (https://olcsupport.office.com/).
Could anyone whitelist 195.242.92.0/24, please?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 15%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKL%3C/text%3E%3C/svg%3E)
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(313.6, 95%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAD%3C/text%3E%3C/svg%3E)
Alain D 21 Reputation points2023-10-11T14:47:48.3766667+00:00 @MS : Do you have an estimation time for resolution ?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(0, 93%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELN%3C/text%3E%3C/svg%3E)
Ledl.net GmbH 0 Reputation points2023-10-11T14:48:00.05+00:00 Same issue for Austria and various IP-addresses (senders):
213.145.228.64
213.145.225.20
213.145.225.90
213.145.224.230
213.145.224.150 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 5%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERM%3C/text%3E%3C/svg%3E)
Radu Minoiu 0 Reputation points2023-10-11T14:50:23.63+00:00 Please add IP 93.115.7.133 (Romania, Bucharest) - E-Novator Data SRL, mail.enovator.ro
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 67%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMF%3C/text%3E%3C/svg%3E)
Mattias Forss 0 Reputation points2023-10-11T14:59:43.5966667+00:00 Incident EX680695
Some users may encounter delays receiving external email messages in Exchange Online
Affected services: Exchange Online
https://admin.microsoft.com/Adminportal/Home#/servicehealth/:/alerts/EX680695 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 52%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EIS%3C/text%3E%3C/svg%3E)
IT Support Netwizard 0 Reputation points2023-10-11T15:01:54.7666667+00:00 @Microsoft support @Outlook please whitelist 201.20.145.214, 201.20.145.231, 201.20.145.207, 201.20.145.210.
Thank you
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(224.00000000000003, 52%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
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Sherif AboulGadayel 0 Reputation points2023-10-11T18:55:16.2266667+00:00 It looks solved now. All emails in the server queue are relayed to domains hosted at outlook.com
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 22%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKY%3C/text%3E%3C/svg%3E)
Kai Yao 37,791 Reputation points Moderator2023-10-12T02:20:23.68+00:00 Hi @All,
This issue should have been fixed.
Please have a check if mail flow is now working for you.
And due to security concern, please edit or hide your ip addresses in the post since this is a public forum.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 91%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPC%3C/text%3E%3C/svg%3E)
PDC COMPUTER 0 Reputation points2023-10-13T10:05:49.6933333+00:00 We in Vietnam and Thailand are similarly affected
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(185.6, 66%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAG%3C/text%3E%3C/svg%3E)
Andres Gavino 0 Reputation points2023-10-28T00:21:36.22+00:00 Hello, we own a small landscaping company in California and we are being affected please allow
75.142.221.255
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 11%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERK%3C/text%3E%3C/svg%3E)
Rajmond Kovács 0 Reputation points2023-11-15T12:25:25.77+00:00 Hungary is also affected.
Please whitelist:
mail.t-online.hu
84.2.46.11
195.228.240.65
Thank you in advanced.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 54%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EH%3C/text%3E%3C/svg%3E)
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 8%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAL%3C/text%3E%3C/svg%3E)
Araibet Login 0 Reputation points2024-06-13T11:16:58.24+00:00 Is this happening all over the world or is it only a few countries experiencing it?
From what I read, some countries don't experience the same thing
- Araibet Login
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(156.8, 61%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBH%3C/text%3E%3C/svg%3E)
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(60.8, 48%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EL%3C/text%3E%3C/svg%3E)
LEEBILLY 0 Reputation points2024-09-13T10:27:45.1366667+00:00 We have the problem in Hong Kong today, Pls fix it asap. tks
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(208, 23%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGB%3C/text%3E%3C/svg%3E)
gary bertrand 0 Reputation points2024-10-05T16:21:30.39+00:00 Can anyone help with password Frequency on MSN Authenticator
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(284.8, 85%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EIG%3C/text%3E%3C/svg%3E)
IT-Glocke 0 Reputation points2025-02-28T12:03:46.3233333+00:00 Hello, please whitelist 93.188.24.252. We have the same issue. Thank you
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IT-Glocke 0 Reputation points
2025-02-28T12:13:22.8033333+00:00 Hello, please whitelist 93.188.24.252. We have the same issue. Thank you
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(73.60000000000001, 99%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELP%3C/text%3E%3C/svg%3E)
Linh Phan 0 Reputation points2023-11-09T03:36:03.54+00:00 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(208, 74%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBJ%3C/text%3E%3C/svg%3E)
Barrey Jewall 0 Reputation points2023-11-10T17:43:20.7+00:00 Also seeing this symptom getting email from a server in Thailand:
451 4.7.500 Server busy. Please try again later from [173.231.200.202]. (S77719) [DS2PEPF0000343C.namprd02.prod.outlook.com 2023-11-09T10:20:14.290Z 08DBDE4ACEA21C4B]
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 52%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMT%3C/text%3E%3C/svg%3E)
masafumi.takahashi 0 Reputation points2023-10-27T07:06:51.7666667+00:00 未解決ですのでホワイトリストに以下IPを登録願います。
203.189.104.91
ありがとう
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masafumi.takahashi 0 Reputation points
2023-10-27T07:27:39.2566667+00:00 追加で以下のIPの登録もホワイトリストへの登録もお願いいたします。
202.172.26.20
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