Forum Discussion
MathieuVandenHautte
Dec 12, 2023Iron Contributor
Delays when sending or receiving emails
Hi all, Multiple customers are experiencing huge delays when sending and/or receiving emails. Emails eventually are successfully delivered to inboxes or quarantined. Example message trace se...
MathieuVandenHautte
Dec 14, 2023Iron Contributor
Hi all,
I can confirm this temporary workaround.
Exclude all custom domains from the Exchange Online Protection (EOP) and Defender for Office 365.