About Rules
Overview
Set a rule when you want to display a Send Alert for an email and prompt the user to recheck the email content.
Rule Attributes
The list of rule attributes is as follows.
| Attribute | Description |
|---|---|
| Scope | Determines the range of users to which the rule applies. For the types of scope, refer to here. |
| Rule Name | A name that identifies the type of rule. For the types of rule, refer to here. |
| Assignment Name | The assignment name of the rule. The name must be unique among rules with the same scope. |
| Description | The description of the rule. |
| Rule Options | Depending on the type of rule specified in Rule Name, options may exist. Refer to here. |
| Status | The status of the rule. The following statuses exist. EnabledDisabled |
Rule Scope
The rule scope includes the following.
| Scope | Description |
|---|---|
| Tenant | A rule applied to all users belonging to the tenant. Created by the administrator. A rule whose scope is Tenant is called a Tenant rule. |
| Group | A rule applied to all users belonging to a group. Created by the administrator. A rule whose scope is Group is called a Group rule. |
| User | A rule applied to an individual user. A rule whose scope is User is called a User rule. |
Rules
There are the following types of rules.
| Rule Name | Send Alert display condition |
|---|---|
| With Attachment | Displays a Send Alert when an attachment is present. For the options that can be specified, refer to here. |
| Recipients Include an External Domain | Displays a Send Alert when an external domain exists among the recipients. |
| Recipients Include Multiple External Domain Names | Displays a Send Alert when the recipients include multiple different external domain names. |
| All Recipients Are External Domains (Excluding the Sender) | Displays a Send Alert when all recipients are external domains. However, a sender included among the recipients is excluded from the external domain determination. |
| Recipient Count Is at or Above the Threshold | Displays a Send Alert when the number of recipients is at or above the configured count. For the options that can be specified, refer to here. |
| Subject Is Blank | Displays a Send Alert when the subject is blank. |
| Keyword Check | Displays a Send Alert when the email contains the specified keywords. For the options that can be specified, refer to here. |
| Recipient Is in the Forced Alert List | Displays a Send Alert when a recipient is in the forced Alert list. For the options that can be specified, refer to here. |
| With Inline Images | Displays a Send Alert when the email contains inline images (images pasted into the body). |
caution
When the email's format is Rich Text, images contained in the body are recognized as attachments rather than inline images, so the "With Inline Images" rule is not applied.
Rule Options
The options that can be specified for each rule are as follows.
Options for the "With Attachment" Rule
The options that can be specified are as follows.
| Item | Description |
|---|---|
| Only when recipients include an external domain | If you want to display a Send Alert only when the recipients include an external domain, check the checkbox. |
| Only specific extensions | If you want to display a Send Alert only when the attachment has a specific extension, check the checkbox. |
| Extensions | Specify the attachment's extension. When specifying an extension, do not include the leading ".(dot)". Multiple extensions can be specified, separated by commas. Example: doc,zip,exe,xls ※ Specify this when Only specific extensions is enabled. |
Options for the "Recipient Count Is at or Above the Threshold" Rule
The options that can be specified are as follows.
| Item | Description |
|---|---|
| Recipient count target | Specify the recipient count target as one of Total, To and Cc, or Specify individually. |
| Recipient count threshold (Total) | Specify the total count. ※ Specify this when Recipient count target is Total. |
| Recipient count threshold (To and Cc) | Specify the total count of To and Cc. ※ Specify this when Recipient count target is To and Cc. |
| Recipient count threshold (Specify individually) | Specify the To count, Cc count, and Bcc count. ※ Specify this when Recipient count target is Specify individually. |
Options for the "Keyword Check" Rule
The options that can be specified are as follows.
| Item | Description |
|---|---|
| Search keywords | Specify the keywords to search for, one keyword per line. |
| Only when recipients include an external domain | If you want to display a Send Alert only when the recipients include an external domain, check the checkbox. |
| Search target | For the target of the keyword search, check the checkbox for Subject, Body, or Attachment file name. |
Options for the "Forced Alert List" Rule
The options that can be specified are as follows.
| Item | Description |
|---|---|
| Forced Alert list | Specify one address per line in the format "address,warning message". An asterisk (*) within an address is treated as any string of zero or more characters. An asterisk (*) cannot be set as a literal character. |
Rules Applied to a User
The rules selected by the following procedure are applied to the user.
However, if the action of the policy applied to the user includes Immediate delivery, Send block, or Rule skip, no rule is applied.
- List the
Tenant rules,Group rules, andUser ruleslinked to the user whose status isEnabled. - From the rules listed in step 1, select the rules that match the Send Alert display conditions.
tip
The Tenant rules, Group rules, and User rules linked to a user can be checked on the Rule Assignment screen of the User Outlook Add-in.