This property contains the value that is transmitted in the ReplyTo: header of the outgoing e-mail.

The value assigned to this property should be a comma separated list of ReplyTo: recipient e-mail addresses.

Beware that many mail clients do not honor this field, they will attempt to send messages back to the ErrorsTo: or From: addresses or may even make one up. These header values are merely conventions and although they are described in various RFC documents, mail clients are written by people whose skills and attention to detail range from the plain careless to the highly professional.