Before you do, you should be forewarned of an increase in various
attacks, including email attacks from broad segments of Azure IP Space.
Insist on getting SWIP for these ranges from Microsoft Azure before
proceeding.
Otherwise you WILL be impacted by others on the Azure network.
NetRange: 52.145.0.0 - 52.191.255.255
CIDR: 52.148.0.0/14, 52.145.0.0/16, 52.146.0.0/15,
52.152.0.0/13, 52.160.0.0/11
NetName: MSFT
NetHandle: NET-52-145-0-0-1
Parent: NET52 (NET-52-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: Microsoft Corporation (MSFT)
RegDate: 2015-11-24
Updated: 2021-12-14
Ref: https://rdap.arin.net/registry/ip/52.145.0.0
OrgName: Microsoft Corporation
OrgId: MSFT
The same goes for anyone thinking of operating a professional email
server on any large cloud provider, eg AWS, GoogleCloud etc..
And keep those SPF records 'tight'.
On 2022-03-10 17:49, Graeme Slogrove via mailop wrote:
Hi everyone,
Looking for some resources at Yahoo and Google to allow for a warm up
period of some new IP addresses. I have already logged a ticket with MS
for IP Mitigation.
We are moving our US services from our own datacenters to Azure. Our
operations in EU and AU run in Azure already.
Previous IP ranges:
204.13.200.0/22
New IP Ranges:
52.165.84.16/28
52.165.84.32/28
20.81.235.96/28
20.81.235.112/28
Many thanks in advance.
https://www.trustwave.com/en-us/services/email-security/
<https://www.trustwave.com/en-us/services/email-security/>
Regards,
Graeme Slogrove
Engineering
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