EmailDLL Online Manual
Parameters: ReplyTo, a string specifying one or more email addresses to which replies are sent.
Returns: Success or Error Status
This method sets the ReplyTo mail header line. This needs to be set when the email address of the sender, set with the Email.SetFrom() method, is different than the address to which replies should go. This is quite common for automatically generated email. The sender is often set as an email address indicating the source as the application, while another address is provided so people can reply to the emails.
Setting a ReplyTo value with this method is not required.
Multiple email addresses can be specified, as long as they adhere to accepted email address syntax .