ZeptoMail: Transactional Email That Reaches the Inbox

Marketing email and transactional email should never share a pipe: one newsletter’s complaints can push a password-reset email into spam. ZeptoMail is Zoho’s answer for the transactional side, built so the emails your store, app or Zoho Creator system sends arrive reliably, while Zoho Campaigns handles the marketing side. It is one of the Marketing & Commerce apps in Zoho One.

What ZeptoMail Does

• REST API and SMTP relay for sending from any application or platform.
• Transactional-only policy: no bulk or promotional mail, which protects reputation.
• Domain authentication with SPF, DKIM and DMARC guidance.
• Templates with merge fields, and attachments.
• Delivery, open and click tracking, with bounce and complaint handling.
• Logs, reports and webhooks for events.
• Mail agents to separate applications and environments.
• Integrations with Zoho Creator, Commerce, Flow and third-party platforms.

ZeptoMail Pricing

Confirm current credit prices and validity on the official ZeptoMail pricing page; ZeptoMail is included in Zoho One.

Transactional or Marketing?

Deliverability Setup

1. Add and verify the sending domain; set SPF, DKIM and DMARC records.
2. Create a mail agent per application or environment.
3. Send a small volume first and watch bounces and complaints.
4. Keep content transactional; marketing content gets the account restricted.
5. Monitor the dashboard weekly and act on bounce reasons.

Common Mistakes

• Sending newsletters through a transactional service.
• Skipping DMARC, then wondering about spoofing.
• One mail agent for everything, so a bug in one app affects all.
• Ignoring bounce reports until deliverability drops.

Who ZeptoMail Fits

Getting Started

1. Verify the domain and DNS records.
2. Create a mail agent and send a test.
3. Point the application at the API or SMTP.
4. Watch bounces for the first week.

How It Fits With Zoho Mail and Campaigns

Three Zoho products send email, and each has a job. Zoho Mail is people writing to people. Zoho Campaigns is marketing to lists, with consent and unsubscribe handling. ZeptoMail is applications sending to individuals about something they did. Keeping them separate is a deliverability strategy: the reputation of each is built on the behaviour appropriate to it, and a problem in one does not spread to the others.

Templates and Content

• Templates with merge fields keep transactional emails consistent and let non-developers edit copy.
• Plain, clear subject lines that say what happened: Your order has shipped.
• A reply-to address someone reads.
• Attachments for invoices and receipts, with size limits respected.
• No promotional blocks; a small cross-sell line is the most ZeptoMail’s policy allows, and often not even that.

Monitoring and Troubleshooting

Related Guides

{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is ZeptoMail?","acceptedAnswer":{"@type":"Answer","text":"ZeptoMail is Zoho's transactional email service: an API and SMTP relay for automated emails such as confirmations, receipts and password resets, with tracking, logs and webhooks."}},{"@type":"Question","name":"Can I send marketing email with ZeptoMail?","acceptedAnswer":{"@type":"Answer","text":"No. It is transactional-only, which is what keeps its deliverability high. Use Zoho Campaigns for marketing."}},{"@type":"Question","name":"How is ZeptoMail priced?","acceptedAnswer":{"@type":"Answer","text":"By credits, each covering about 10,000 emails, bought in advance with volume discounts and a trial allowance. It is included in Zoho One."}},{"@type":"Question","name":"Does ZeptoMail support SMTP?","acceptedAnswer":{"@type":"Answer","text":"Yes, SMTP and a REST API, with SDKs for common languages."}},{"@type":"Question","name":"How do I set up authentication?","acceptedAnswer":{"@type":"Answer","text":"Verify the domain and add the SPF, DKIM and DMARC records ZeptoMail provides."}},{"@type":"Question","name":"Does it integrate with Zoho apps?","acceptedAnswer":{"@type":"Answer","text":"Yes, with Zoho Creator, Commerce, Flow and others, and with third-party platforms through SMTP or API."}}]}