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Connect Zoho Mail.

Use the SMTP server shown inside your Zoho Mail account. The correct host depends on the account type and data centre, and Zoho's hourly reputation limits still apply.

3 MIN READALL PLANSUPDATED OCT 2026

What you need.

01

An active Zoho Mail mailbox

02

The SMTP server shown in Zoho Mail's Server Configuration Details

03

The complete Zoho Mail address used as the From address

04

An application-specific password if two-factor authentication is enabled

Steps

  1. Find your SMTP serverSign in to Zoho Mail. Open Server Configuration Details and copy the SMTP server shown for your account.
  2. Create an application passwordIf two-factor authentication is on, create an application password in Zoho Accounts and copy it.
  3. Add the connection in Sync NotifyEnter Zoho's account-specific host, port 587 with TLS, the complete email address as the username, and the mailbox or application-specific password.
  4. Test and sendRun Test and send. Keep the From address equal to the authenticated address or one of its configured Zoho aliases.

Settings to enter.

Sync Notify fills these in when you choose the Zoho preset. They are here so you can check them.

ZOHO PRESET
Personal / free organization host
smtp.zoho.comConfirm the data-centre-specific value inside the account
Paid organization host
smtppro.zoho.comFor domain-based paid accounts; confirm inside the account
Recommended port
587TLS
Alternative port
465SSL
Username
Full email addressMust match the mailbox or one of its aliases
Provider limits
50–500 external emails/hourDynamic by sender reputation; up to 100 recipients/message on free and 150 on paid accounts

Common errors.

ERR 01Authentication failed

Zoho rejected the username or password, often because two-factor authentication requires an application password. Use the complete email address and create a fresh application-specific password if two-factor authentication is enabled.

ERR 02Relaying disallowed or sender mismatch

The From address does not match the authenticated Zoho mailbox or a configured alias. Use the authenticated address as the From address, or add and verify the required alias in Zoho before retrying.

ERR 03Sending limit reached

Zoho's external sending allowance is dynamic and does not support bulk or burst sending from a normal mailbox. Pause until the rolling hourly restriction clears, lower the sending rate, or use Zoho's dedicated campaign or transactional service for higher volume.

Official references.