FAQ
Frequently asked questions
Quick answers about setup, sending behavior, and integration.
Quick answers
Expand a question below for the short answer. For integration steps, see the quickstart guide.
What is Piisend used for?
Piisend is an email API for transactional mail (OTP, verification, password reset) and marketing or promotional campaigns. You integrate via HTTPS with curl, JavaScript, or Python examples in the docs.
Can I send from my own domain?
Yes. Verify your domain with DNS (SPF, DKIM) and set from_ on API sends. Until verification completes, a shared platform address can be used.
How do I integrate with my app?
Create an API key from the dashboard (API → Keys), then call POST /emails on https://api.piisend.com (see /docs/getting-started for the full https://api.piisend.com/api/v1/emails example).
Do you support event visibility?
Yes. Delivery-related events appear via webhooks and in message detail. Subscribe to delivery, bounce, complaint, open, and click events.
How fast is delivery?
Messages are queued and sent through our delivery stack as soon as they are accepted. Exact inbox timing depends on recipient providers and your domain reputation.
Can I use my own domain?
Yes. You can verify multiple custom domains and manage DNS records directly.
Is there a free tier?
Yes. The Free plan includes 3,000 emails per month on the default catalog—confirm live quotas in your dashboard after signup.
What are the rate limits?
On the default Free plan you get 3,000 emails per month and 100 emails per day. Pro is $20/mo for 50,000 emails per month with no daily cap—extra volume is $1 per 1,000 emails on the catalog. Confirm live quotas in your dashboard after signup.
Do you support SPF, DKIM, and DMARC?
Yes. Verified sending domains are aligned with modern authentication expectations so receivers can trust your mail.
Can I receive webhooks for bounces and complaints?
Yes. Subscribe to delivery and reputation events so your product can suppress bad addresses and audit sends end-to-end.
Can I send marketing or promotional email?
Yes. Piisend supports transactional and marketing workloads—campaigns, announcements, and lifecycle mail—when you follow applicable consent and anti-spam laws.