The "Description" and "Lower and Upper IP" sections seem pretty self-explanatory. However, the "E-mail address" has presented some difficulty and probably needs some clarification...

The manual states;



1. Are multiple * allowed in each entry?
2. Are ? allowable as single character wildcards?
3. Does the example, "*@example.com", whitelist ALL email from the domain example.com (e.g. implied "*@*example.com) ... or just "all-the-mailboxes" for example.com ?
3a. If the former is the case, is the"@" optional?
3b. Is "admin@*example.com" valid for admin@mail1.example.com, admin@mail2.example.com AND admin@example.com
4. What field from the email message header is used to create the 'matching' text for this entry?

Thanks

1) Yes
2) Yes
3) It works as a normal wildcard. *@example.com whitelists all email from the domain example.com, not from someotherdomain.example.com.
3b) Yes
4) If the message is delivered to hMailServer using SMTP, the FROM envelope address is used (not any of the MIME headers). If the message is downloaded from an external POP3 account, the From MIME header is used.