DNS Guide: Cloudflare | PostNuvia

Steps

Log in to the Cloudflare dashboard
Select your domain
Go to DNS, then click Records
Click Add Record for each record PostNuvia requires

Adding a TXT Record (SPF)

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

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 on the same domain will cause authentication failures.

Adding a TXT Record (DKIM)

Field	Value
Type	`TXT`
Name	The DKIM selector host from PostNuvia (e.g., `selector._domainkey`)
Content	The DKIM TXT value from PostNuvia
TTL	`Auto`

Cloudflare automatically strips your domain from the Name field. Enter only the selector host portion (e.g., selector._domainkey), not the full 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`
Name	`@` (or your subdomain)
Mail server	The MX target from PostNuvia
Priority	`10`
TTL	`Auto`

If you want to receive emails on a subdomain to avoid conflicts with your existing email provider, enter the subdomain instead of @ in the Name field.

Verification

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

Cloudflare DNS typically propagates within 1 to 5 minutes, making it one of the fastest providers for DNS updates.

Common Cloudflare Issues

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.
Duplicate TXT values: Cloudflare lets you add TXT records with the same name, but duplicate SPF or stale DKIM selector records can make verification fail. Keep only the current values PostNuvia provides for each host.
Name field auto-strips domain: Cloudflare removes the domain portion from the Name field automatically. If your DKIM selector is selector._domainkey, enter just that. Do not enter selector._domainkey.yourdomain.com, or the record will be created incorrectly.