From the notes log, I can see that the mail is delivered to many recipients(these are the valid users in my company, e.g. email@example.com). As these recipients open up the mail,the value in the SendTo field contains names(invalid user, e.g firstname.lastname@example.org) other than the recipient's name.
What are the circunstances that would cause the server to send mail to email@example.com(valid users as seen in the notes log) and the value in the SendTo field contains names(invalid user, e.g firstname.lastname@example.org) other than the recipient's name when the mail is opened up?
Users are asking why they are receiving mails not meant for them. Why they are receiving mail meant for other domain(@yyy.com)?
We have ScanMail on our server to scan all incoming and outgoing mails. There is only 1 server, is a simple set up. There is no passthru, incoming, outgoing server, etc.