networksolutions.com doesn't have ALIAS (cname) records. only A or CNAME

CNAME
@
8lao2l7q.up.railway.app
Record not yet detected

i get tthis error: MX record already exists for trajectory.us.com., please remove the MX record first

why would MX interfer?

CNAME flattening is required for this

There are some providers that do not support CNAME Flattening, here's a list provided by Railway:

https://docs.railway.com/guides/public-networking#adding-a-custom-domain

And here is a link to how to setup the root domain with www subdomain in Cloudflare, which is the provider recommended to use

https://docs.railway.com/guides/public-networking#adding-a-root-domain-with-www-subdomain-to-cloudflare

oh so i have to use cloudflare if cname flattening is not supported??

Yes, if your provider doesn't support it, the most easy way is to point the dns nameservers to cloudflare

got it, that worked, thanks!