To see what you are doing wrong, (if anything), we need a more detailed description of exactly what you have set up in terms of your relationship between the two tables and exactly what you have specified in the send mail dialog.
Also, what email client program is installed on your computer. Not all email clients are compatible with FileMaker.
I know for a fact that the client is compatible with FM so I'm afraid it's my relationship that doesn't work.
The two tables are at the moment not related since it doesn't work....
The send mail dialog is as follows:
To: "Recently deleted, before": InternalInformation_PERSON::Email
Message: INTERNALINFORMATION::Notes & ¶ & ¶ & "Best wishes." & " " & INTERNINFO::Signature
What you post shows references to three table occurrences: InternalInformation_PERSON, INTERNALINFORMATION and INTERNINFO
Without a valid relationship linking the three occurrences, only fields from one will contain data at the time your send mail is used in an attempt to send an email.