# Do I have to set up DKIM, SPF and DMARC?

> Yes, for anything you intend to send at scale.

Source: https://warmerly.com/docs/faq/do-i-have-to-set-up-dkim-spf-and-dmarc

Yes, for anything you intend to send at scale. They are the difference between delivered

## More from Frequently asked questions

- [How many mailboxes do I need?](https://warmerly.com/docs/faq/how-many-mailboxes-do-i-need): Work back from volume: mailboxes x daily limit (30/day by default).
- [Can I use a shared or alias mailbox?](https://warmerly.com/docs/faq/can-i-use-a-shared-or-alias-mailbox): Yes, with the SMTP/IMAP username set to that mailbox's own address, provided the signed-in
- [What is a placement test?](https://warmerly.com/docs/faq/what-is-a-placement-test): A probe that sends real email from your mailbox to test mailboxes and reports inbox vs