The addition of a signature is based on the 'Principal' field and the 'From' field.

Depending on how the e-mail is sent it may contain both of these fields or just the 'From' field.

These fields are used for determining who has sent the e-mail, if the user is an internal user and which configuration document to use.

To determine who sent the e-mail the following rule is followed

1. If the Principal field is available use this field as the name of the person who sent the e-mail.
2. If the Principal field is blank use the From field.
3. If the From field contains '<' and '>' take the name in between.

The names extracted may not be a Notes Name, it may be an internet address e.g. POP3 Clients

e.g
Les Battersby
Les Battersby/Crossware
LBattersby@crossware.co.nz
les@crossware.co.nz

If the name in the Principal field is equal to the name of the Mail File owner then the name in the Principal field takes precedence.

Once the name has been extracted the name will be checked against the ($Users) view in the Domino Diectory. If there is no match the e-mail is allowed to pass without adding a signature. If there is a match the user is considered as an internal user and the 'FullName' (field) is extracted from the Person Document.

The 'FullName' field is then used in the Group Lookup stage.