Can I edit the ‘sender email’ – mailer@zotabox.com?
We can’t set the customer email as sender because our email service only accepts verified email address (mailer@zotabox.com) to forward you messages from your customers.
We set the customer email in the “Reply-To” field in the email header.  So when you click reply, the email will be sent to your customer email address, not our sender email.
Also, when you use our ‘auto-response’ the ‘actual’ sender will be mailer@zotabox.com but your customers will see your email address as the ‘reply to email’ and reply directly to you.