If you are told that your emails or newsletters are not being received or sending, here are a few things you can check:
The opt-in/ out status
Everyone has the right to opt it or out of email communication. If the status is 'opt out' or red, then no emails will reach that email address. If you have consent to change this back to 'opt in', you can do so by editing the profile and click the check-box underneath the email field
The email address
Check that there is no typo on the email address. The person could have mistakenly entered an incorrect email address, which can easily be corrected by editing the profile (see screenshot above). Our email server can also change a status to 'opt-out' if the email account provided was incorrect: if you see a profile change from opt-in to opt-out after sending them a newsletter, this could be why.
Individual spam filters
Typically when someone gets auto opted-out after each message, it's related to them providing the wrong e-mail or it's being blocked via the global spam report blocks. If the person flags one of your e-mails as spam in their email account, the system will stop sending/ change to opt-out in order to avoid spam.
We try to maintain people's preferences when they block us or mark us as spam, that's why we auto opt-out. It helps ensure delivery to the rest of your database.
Check other email folders
Emails are controlled by Google, and sometimes your emails may end up in the Promotion/Updates/Social folders instead. Google look for patterns in the e-mail and typically if it’s the same or similar subject, body or timing they treat it as promotional item vs a transaction or personal message. The best way to avoid the promotion box is to leverage automation to trigger these messages on a different frequency than all at once in a newsletter.