How to whitelist our Email to Text notifications

We don't have any process for whitelisting external sources due to shared network configurations with spam sources. One thing that can help is to pick unique email user accounts that are not a generically shared combination with spam senders. So don't send from email addresses that start with things like noreply@ o admin@. We also use volumetric guidelines, so if you're sending out lots of messages it could still get flagged as spam. In that case, your best bet is to use a short code to send out updates to individuals.