ESP Integrations
Pro adds dedicated email service provider (ESP) integrations. Sending through an ESP gives you higher throughput, better inbox placement, and provider-side analytics compared with the built-in WordPress mailer.
Supported providers
Section titled “Supported providers”| Provider | Notes |
|---|---|
| Amazon SES | Very low cost at high volume; great once your domain is verified |
| SendGrid | High volume with detailed provider analytics |
| Mailgun | Developer-friendly, strong deliverability tooling |
| Postmark | Fast, reputation-focused delivery |
| Brevo | All-in-one sending platform |
The Free plan includes PHP Mail and Custom SMTP. The five providers above are Pro.
Setting up a provider
Section titled “Setting up a provider”- Create an account with your chosen provider and verify your sending domain (SPF and DKIM). This step is what actually earns inbox placement. See Sending and Deliverability.
- Generate an API key or SMTP credentials in the provider’s dashboard.
- In PrimoCRM, go to Settings then Sending, choose the provider, and enter the credentials.
- Send a test and confirm it arrives.
Choosing a provider
Section titled “Choosing a provider”- Cost at scale: Amazon SES is typically the cheapest for large volume.
- Analytics and ease: SendGrid, Mailgun, Postmark, and Brevo offer richer dashboards and simpler setup.
- Already using one: if you already have an account with any of these, use it.
How sending behaves
Section titled “How sending behaves”Once a provider is configured, campaigns and sequences send through it using the same background worker and throttling as before. The provider handles delivery and reports bounces and complaints back, which PrimoCRM uses to keep your contact statuses accurate.