ZeptoMail

What ZeptoMail is

ZeptoMail, now Zoho CPaaS, is an email service built specifically for transactional messages such as verification codes and password resets. Sending works through SMTP relay or an email API, with agents grouping mail by domain, application, or purpose and using separate credentials. Logs show status, recipients, bounces, clicks, and opens; webhooks can send those events to a public URL. Security controls include encryption at rest, TLS, SPF, DKIM, CNAME verification, two-factor authentication, role permissions, and sending-IP restrictions. Listed compliance includes GDPR, HIPAA, ISO standards, and SOC reports. Integrations include Zoho Flow, Zoho CRM, WordPress, Zapier, Microsoft Power Automate, Magento, Laravel, and Django. Technical assistance is included at every usage level. The first email credit is free and covers 10,000 emails for six months. Paid credits have no monthly minimum, but also expire after six months. Promotional or bulk email is directed to Zoho Campaigns.

Who it suits

ZeptoMail suits developers and organizations sending transactional email through SMTP or APIs. It is not intended for promotional or bulk campaigns.

Limits

The first free credit covers 10,000 emails and remains valid for six months. Pay-as-you-go credits cover 10,000 emails each, have no monthly minimum, count each recipient as one email, and expire after six months.

Getting started

1. Open the ZeptoMail website
2. Start the free trial
3. Choose SMTP relay or the email API
4. Create groupings by domain, application, or purpose
5. Configure credentials, templates, and integrations
6. Send transactional messages through the web or API

Verdict

ZeptoMail focuses narrowly on transactional delivery, with event visibility, integrations, and security controls. Confirm the six-month credit expiry and campaign restrictions fit your sending model.