There are 3 reasons why we would have to use [email protected] instead of your email address.
We detect a DMARC policy of reject or quarantine. When your email server has this set up, if we try to use your email address it will not be delivered.
Your mail server has a TXT record of “_betterimpact-rewrite-sender”. This can be done to force us to send using [email protected] for any reason.
We detect that you are using office 365. Unfortunately, office 365 doesn’t follow all the normal rules of email sending and if we use your email address, it will show a warning message and sometimes cause emails to not be delivered properly.