Hi,
Sean Kamath via mailop wrote on 21.07.26 at 10:07:
Searching my mailop archives for S3140 only finds one hit (from Michael Wise in 2022). From Michael Wise’s signature, and also the link onhttps://substrate.office.com/ip-domain-management-snds/Postmaster/
Troubleshooting (followed from the link in the above rejection message) the form to use ishttp://go.microsoft.com/fwlink/?LinkID=614866
I see other messages that shows the form to use is
athttps://olcsupport.office.com/, but I think that is for S3150 (perhaps a
different product group?).
from what I recall, the olcsupport site is for issues with delivery to
MS365 tenants/domains, while the other is for delivery issues to the
Hotmail/Live/Outlook services.
Florian
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