> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upflow.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Action emails not delivered
> Investigate failed Upflow reminder emails using the Team Activity analytics view, count delivery failures per month and identify the root causes behind them.
In your Analytics list view, access your Team Activity saved view:
Scroll down to the "Action email not delivered" widget to see how many emails failed for each month.
## Understand the data
Clicking on each bar will redirect you to the Contacts list view, which has the filter "Email status = Invalid email."
Please note that the number of contacts displayed under this filter might not match the number of emails not delivered in the Analytics widget.
This can be due to:
* multiple emails failed to be delivered for the same contact;
* a contact marked as invalid at the time the email was sent is now valid.
Check our article [Your Upflow contacts](/en-us/core-entities/contacts/your-upflow-contacts) to handle invalid email addresses.
## Export the data
To have a detailed view of this widget, you can export it (CSV/Excel):
The default view will be as follows:
Here are a few tips to see all emails and reasons on individual lines.
1. Select a spreadsheet and click relevant cells.
2. Go to Data and open Split text to columns.
3. Click Separator and open Custom.
4. Type @, and Google Sheets splits the username and domain name.
Now, all address emails are in different cells but horizontally.
To get a vertical display, copy the cells with the addresses, then choose the cell where you want the transposed data to start. Right-click on the chosen cell, navigate to "Paste special," and select "Transposed."
## Microsoft Exchange "Direct Send" rejections
When an email is sent from Upflow, where both the sender and recipient share the same email domain and their mailboxes are hosted in Outlook (Exchange Online) with Direct Send disabled, the message is rejected.
This is caused by Microsoft's [Direct Send](https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365#option-2-send-mail-directly-from-your-printer-or-application-to-microsoft-365-or-office-365-direct-send) feature, which blocks emails sent on behalf of your domain by a third-party service.
This is not an Upflow-side issue: the same behavior is documented by other providers, e.g. [Salesforce](https://help.salesforce.com/s/articleView?id=000389721\&type=1).
### How to resolve it
Your IT team needs to allow Upflow as an authorized sender in the Microsoft 365 / Exchange settings. They should contact Microsoft Support or follow the [official Microsoft guidance](https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365) to review their Direct Send configuration.
Setting up [your own sending domain](/en-us/collection-and-collaboration/emails/sending-emails-configure-your-domain) in Upflow does not resolve this — the rejection happens on the recipient's Exchange tenant, not on the sender's side.