DNS Guide: Namecheap | PostNuvia

Steps

Log in to your Namecheap account
Go to Domain List → click Manage next to your domain
Select the Advanced DNS tab
Click Add New Record for each record PostNuvia requires

Make sure your domain is using Namecheap BasicDNS or Namecheap PremiumDNS as its nameserver. If you’ve pointed your nameservers to another provider (e.g., Cloudflare), you’ll need to add records there instead.

Adding a TXT Record (SPF)

Field	Value
Type	`TXT Record`
Host	`@` (or your subdomain)
Value	The SPF value from PostNuvia (e.g., `v=spf1 include:postnuvia.com ~all`)
TTL	`Automatic`

If you already have an SPF record for your domain, do not create a second one. Instead, add include:postnuvia.com to your existing SPF record. Having multiple SPF records will cause validation failures.

Adding a TXT Record (DKIM)

Field	Value
Type	`TXT Record`
Host	The DKIM selector host from PostNuvia (e.g., `selector._domainkey`)
Value	The DKIM TXT value from PostNuvia
TTL	`Automatic`

Namecheap automatically appends your domain to the Host field. Enter only the selector host portion. For example, enter selector._domainkey, not selector._domainkey.yourdomain.com.

Legacy orgs should keep existing working DNS records in place. For new domain setup, add the TXT selector records shown in PostNuvia.

Adding an MX Record (Receiving)

Field	Value
Type	`MX Record`
Host	`@` (or your subdomain)
Value	The MX target from PostNuvia
Priority	`10`
TTL	`Automatic`

If you want to receive emails on a subdomain to avoid conflicts with your existing email provider, use the subdomain (e.g., mail) instead of @ in the Host field.

Verification

After adding all records, go back to the PostNuvia Console and click Verify Domain.

Namecheap DNS typically propagates within 15 to 30 minutes, but in some cases it can take up to a few hours. If verification doesn’t succeed immediately, wait and try again.

Common Namecheap Issues

Host field auto-appends domain: Namecheap adds your domain automatically. If your DKIM selector is selector._domainkey, enter just that, not the full selector._domainkey.yourdomain.com. If you enter the full value, the actual record will end up as selector._domainkey.yourdomain.com.yourdomain.com.
Existing SPF record: If you already have a TXT record starting with v=spf1, add include:postnuvia.com before the ~all or -all in that existing record. Do not create a second SPF TXT record.
Wrong nameserver: If your domain uses Custom DNS nameservers (e.g., pointing to Cloudflare or Route 53), records added in the Namecheap Advanced DNS panel will have no effect. Add your records at the provider that controls your nameservers instead.
Propagation delays: Unlike some providers, Namecheap propagation can take 15 to 30 minutes. If verification fails, wait and retry before troubleshooting further.