Hi @AtanasM,
To avoid the blocking of the mailbox you can try to whitelist the mailbox:
o whitelist the mailbox and ensure that messages from its email address are trusted by the security system, you can take the following specific steps in Microsoft Exchange:
Access Exchange Admin Center (EAC):
- Sign in to your Microsoft Exchange Admin Center (https://admin.exchange.microsoft.com) using your admin credentials.
Navigate to "Mail Flow":
- In the EAC, go to "Mail Flow" from the left-hand navigation menu.
Select "Rules":
- Click on the "Rules" tab under "Mail Flow."
Create a New Rule:
- Click on the "+" icon or "Add" button to create a new rule.
Name the Rule:
- Give the rule a descriptive name, such as "Whitelist Mailbox"
- Give the rule a descriptive name, such as "Whitelist Mailbox"
Configure the Rule Conditions:
- In the "Apply this rule if..." section, set the conditions to match messages from the specific email address of the mailbox you want to whitelist.
- For example, choose "The sender is..." and enter the email address of the mailbox in question.
Set the Action:
- In the "Do the following..." section, choose the action to be taken when the conditions are met.
- Select "Modify the message properties" and then "Set the spam confidence level (SCL) to..." Set it to the lowest value, which indicates the message is not spam (e.g., -1).
Save the Rule:
- Click "Save" to save the new rule.
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Kindest regards,
Leon Pavesic
