A: Hello sbphoto42,

SendFox does not have SMTP settings, and instead we use your domain validation! :)

To use an email address with a custom domain that you own, you will need to validate that domain within SendFox.
We have created a video to assist in domain validation. :)
You may see it here:
https://youtu.be/PVIIfG3plQY

Generally, the steps in validating a domain in SendFox are here: https://sendfox.helpscoutdocs.com/article/127-how-do-i-validate-my-domain.
If you are using Dreamhost, Google, GoDaddy, or NameCheap as your domain hosting service, you will want to follow these steps below instead: https://sendfox.helpscoutdocs.com/article/139-validate-domain-namecheap-godaddy.
Additionally, if you’re on Cloudflare, you will want to edit the Proxy Status of each of the CNAME records and set them to “DNS Only” instead of “Proxied”.
When this is done, you can change the From Email field in your Email Editor and replace it with an email address with the validated domain name in the following instances:
- when you create a brand new email campaign.
- in all of your sequence emails inside your Automation series
- In the Double-Opt-In email, you can customize this by editing the email campaign called "Please Confirm Your Subscription" that you can find in your Emails Dashboard.

Once you have successfully sent the newsletter with the validated email address, SendFox will remember that email address, and you will no longer need to change the From email again.

Have a lovely day and kind regards from the Team Originals!