Can Two Microsoft 365 Tenants Share Mail Flow During a Partial Migration?
Our company is merging with another organization, but only some users are moving to a new Microsoft 365 tenant. Half of the mailboxes will remain in the old…
mail flow
What outbound email limits does your organization use?
What limits has your organization configured for outbound email, especially external recipients per hour, internal recipients per hour, and total recipients per day? A commonly suggested baseline is…
Are others seeing Exchange Online email failures with STOREDRV poison-message errors?
I'm seeing the same email problem across three separate customer tenants. Messages are failing to send or arrive, sometimes with no useful error details, and other times with:…
Is Proofpoint having a DNS-related outage affecting external email?
Is anyone else unable to send or receive external email through Proofpoint? Our inbound and outbound mail stopped working, and the Proofpoint MX hosts are not resolving to…
Is Proofpoint having a DNS-related outage affecting email delivery?
Is anyone else unable to send or receive external email through Proofpoint? Our inbound and outbound mail stopped working at the same time, and the Proofpoint MX records…
Why Am I Getting Duplicate Emails From the Same Sender?
I'm having a weird issue where one of my users is receiving duplicate emails from the same sender. In the Exchange Admin Center (EAC) message trace, I see…
Is Barracuda's Mail Service Down for Everyone?
I've been trying to connect to Barracuda's email servers, but I'm getting some read errors from their edge servers. It seems like other users are experiencing the same…