It often happens that you sent an invoice and wait for it to be paid until payment is due, then you pick up a phone to find out that person has never seen the email. It could be lost within his/her hundreds of emails per day and he/she didn't notice or it went to SPAM for some reason, or even worst the email invoice was sent is wrong and we keep sending bills to none existing address. Therefore it would be great to know whether we could track an email deliverability.
For Example, once invoice is emailed it will have different statuses:
- Not viewed
- Links followed (list followed links)