Copy and paste the following Regular Expression into the Regex field below: From.) Under Email Checking section make sure the only box checked is Check Inbound Emails. When installed as SMTP mode, you can, in a way, select the mailboxes from being added to the license count and excluded from filtering, but there are also limitations, as features that query the Active Directory are not available unless using Remote Active Directory. Under the General Tab enter a name for your rule (I suggest TLD Whitelist) In the Conditions section, choose Headers - Matches Regex. The Personal Whitelist/Blocklist feature requires access to the Active Directory to query the users/mailboxes. This option can not be changed once the software has been installed. As of MailEssentials 20 Remote Active Directory can be selected during installation to allow access. The Personal Whitelist/Blocklist can only be used when MailEssentials prior to MailEssentials 20 is installed in Active Directory Mode, therefore the only solution that will allow this feature to work is to install MailEssentials on a server joined to the domain.
The Personal Whitelist/Blocklist not visible in the configuration when MailEssentials is installed in SMTP mode.