DNS Guide: Namecheap | AgentMail

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 AgentMail 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 AgentMail (e.g., `v=spf1 include:agentmail.to ~all`)
TTL	`Automatic`

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

Adding a CNAME Record (DKIM)

Field	Value
Type	`CNAME Record`
Host	The DKIM selector from AgentMail (e.g., `agentmail._domainkey`)
Value	The DKIM target from AgentMail
TTL	`Automatic`

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

Adding an MX Record (Receiving)

Field	Value
Type	`MX Record`
Host	`@` (or your subdomain)
Value	The MX target from AgentMail
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 AgentMail 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 agentmail._domainkey, enter just that, not the full agentmail._domainkey.yourdomain.com. If you enter the full value, the actual record will end up as agentmail._domainkey.yourdomain.com.yourdomain.com.
Existing SPF record: If you already have a TXT record starting with v=spf1, add include:agentmail.to 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.