Domain switches from "Configured Correctly" to "Invalid Configuration"

Sometimes my site works, sometimes it doesn't. It goes back and forth between "Configured Correctly" to "Invalid Configuration". See the below screen shots.

Domains Summary View Domain Invalid 1 Suddenly Domain is Valid Domain Invalid again Domain Summary Invalid

Here's the main configuration page: Screenshot 2025-05-21 at 11.20.46 AM

To be honest, following the Domain Setup guide is pretty confusing. When I transferred my domain to Vercel, I didn't do anything except add some TXT and MX records for RESEND (for emails) and two additional DNS Servers for email as well. Everything else was already there. Maybe I need to start over?

Also, when I look at the settings under Domains for my main account, I don't see a CNAME record, but when I look at Domains under my deployment account, I see a CNAME record.

Also, I'm paying Vercel for the domain hosting, yet your chat says I can't open a ticket because I'm not a paying customer. I'm not very happy with this service so far. Any help would be greatly appreciated.

Hey I work on Domains here

Thanks for posting your issue: I looked at your domain config and noticed you have conflicting nameservers set

This is causing the dns records to vary from what they are set on vercel.

Can you try going to your registar's nameserver configuration page and removing the non-vercel nameservers?

Thanks, Ethan. I'll give it a shot. I was wondering about that because my email provider (Fastmail) told me to add those name servers in order for my domain email to work. 🤷🏼‍♂️ I need to get a better understanding...

Configuring email usually just involves setting an MX record that points to your mail server

its likely fastmails nameservers do that for you- but this should be pretty easy to add in the vercel dns console without switching nameservers

check out https://www.fastmail.help/hc/en-us/articles/1500000280261-Setting-up-your-domain-MX-only

Thanks again, Ethan. We were on the same page. Already configured the MX, CNAME, and TXT records for Fastmail. I appreciate your help!