Sender Email

To setup or edit your sender email, go to Settings > List Settings > Preferences and click on the Sender tab (view screenshot).

In this section you can edit:

Email sender name: the person or entity that is sending the message. It could simply be your company name.
From email: the email address that is sending the message. Make sure that it is a recognizable address (e.g. it uses your Web site domain: example@yourcompany.com )
Header sender: enter an email address here if you want your message to be sent on behalf of that address.
Reply-to email: If your newsletter asks for a reply from the recipients, you may want the replies to be sent to a different address from the from email. Enter the reply-to address here: it must be a valid email address. If you leave the field blank, the from email will be used.