You can define email validation rules to validate email addresses for messages sent from the advanced Zimbra Web Client. If an address is invalid based on the regular expression rules, users are notified that the address is invalid.
Examples of regular expressions:
test@\\d+.com. This regular expression identifies email addresses with a number in the domain name as invalid. That is test@123.com or test@1.com are not valid addresses.
mail@donotreply.com (any specific address). This type of regular expression identifies a specific email address that is invalid.
Email validation does not work when messages are sent from the standard Zimbra Web Client.
Procedure
Go to the Configure>Global Settings>Advanced page or Configure>Domains>Advanced page.
In the Account Email Validation Settings section, Regular expression for invalid email address field enter a regular expression (regex) to filter out email addresses that should be considered invalid. You can add multiple regular expressions.
Click Save.
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