Configuring Zoho SMTP Settings: A Step-by-Step Guide

Created On
February 1, 2023

SMTP stands for Simple Mail Transfer Protocol. Using this, you can send mails from an email application via a specific server.

It’s used to send mails through another email client via your Zoho Mail account by configuring the settings in that client with Zoho's SMTP information.

Zoho Mail SMTP Configuration Settings - SSL

Outgoing Server Settings

For Personal users

Personal users are individual users with an email address that has a username, such as

Outgoing Server Name:

Port: 465

Security Type: SSL

Require Authentication: Yes.

For Organization users

Organization users are those who have a domain-based email address, such as

Outgoing Server Name:

Port: 465 with SSL or

Port: 587 with TLS

Require Authentication: Yes


The email address should match the email aliases/ email addresses of the account for which the authentication details are given.

Zoho Mail SMTP Configuration Settings - TLS

Outgoing Server Name:

Port: 587

Security Type: TLS

Require Authentication: Yes.

The address must match the account's email aliases/ email address, for which the authentication details are provided.

If you have enabled Two-Factor Authentication, you may require an Application-specific Password to set up the account on other devices.

Troubleshooting Settings for SMTP Server

Duplicate Sent Email Copies

When you send mail from other ISPs like Outlook, Hotmail, Gmail, or any other email clients using, those sent emails get saved in your Sent folder automatically.

But, sometimes, some ISPs save a copy in the local Sent folder by behavior. This results in duplicate emails in the Sent folder. One is the mail saved by the email client, and the other one is by the Zoho Servers. In such cases, the user can choose the option “Do not save a copy in the Sent folder” to avoid 2 copies of every message. ​

➡️ Login to Zoho Mail

➡️ Go to Settings ​

➡️ Navigate to Mail Accounts and click the respective address from the left listing.

➡️ Under the SMTP section, uncheck the 'Save Sent Mail Copy' to not save the mails sent using the configuration in the Sent folder.

Unable to Connect to Outgoing/ SMTP Server

Sometimes, ISPs connect to the default port 25 when connecting to the SMTP server. In the case of Zoho Mail, you need to connect to in SSL or TLS ports i.e 465 or 587 respectively.

For example: In Outlook, you need to check the 'Advanced Server Settings' section.

However, if the port details are correct but there are still issues in connecting to the server, you need to get the traceroute details for server and share it to

Don’t forget to provide the details of your account, your email client, and the necessary screenshots of the configuration, etc.

Authentication Failure

When configuring SMTP/ Outgoing Server, you need to provide the address and the correct authentication password.

If you have enabled Two-Factor Authentication, you may require an Application-specific Password to set up the account on other devices.

Relaying Disallowed Error

You will see a 'Relaying Disallowed' error while sending an email if the login credentials (the address) you have provided in the application do not match the credentials (the address) of your account's outgoing server.

The SMTP client will fail to send the mail because of the mismatch of the credentials.

It can also happen if a mail address is wrongly spelled while configuring your email inbox or used as default in a coded program.

You need to correct the mail address provided to resolve the 'Relaying Disallowed' error.

Relaying Disallowed Error while Using Outlook Calendar and Mail

Outlook tries to send mails with the “From address” as Organizer's email address when a user tries to forward 'Calendar Events' directly from Outlook. In such cases, you will see the 'Relaying Disallowed' error.

You can’t forward the invitation directly because the addresses don’t match when you send the invite.

Instead of this, you can right-click the event and choose the option of 'Forward as Attachment' to send the event invitation.

Not Receiving Emails from Website Contact Forms

The Submit option in ‘Webforms’ or 'Contact us' forms of a website is typically used to send mails. Your Website Hosting Provider (Web Host) triggers these mails.

Mostly the website's domain name matches the address, as the address is based on the domain name.

For instance, page will submit the details of

In such cases, the Web Host or email server assumes that the mails should be delivered locally as the domain name is the same and triggers the mail wrongly.

How to Fix

Open the WebHost settings


Click on the “Remote Email server option” and denote that these emails should be delivered externally


Check for any Local Email Delivery configuration and switch off the WebHost's local setting.

Such measures will ensure that emails from webforms or contact forms reach the Zoho Mail servers and are delivered to the correct email accounts.

Checkout zoho IMAP settings here.


How to setup the SMTP server for Zoho Mail?

First, login to your Zoho Forms account as the Super Admin using your email address and password. There is an icon to access the Control Panel in the top-right corner. Click on it.

Next, click on “Simple Mail Transfer Protocol” (SMTP) Configuration under Notification Settings. After that, click on “Add Server”. There will be a pop-up on your screen; enter a Server Name on that. Next, select the SMTP, enter your SMTP credentials, select a connection type for encryption, and you are done. Don’t forget to click on “create”.

What is the outgoing mail server for SMTP?

An outgoing mail server for SMTP is the machine-speaking SMTP protocol that handles all email delivery processes. As the name suggests, it takes care of the sent emails.

What’s a Rich Text element?

The rich text element allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually. Just double-click and easily create content.

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Static and dynamic content editing

A rich text element can be used with static or dynamic content. For static content, just drop it into any page and begin editing. For dynamic content, add a rich text field to any collection and then connect a rich text element to that field in the settings panel. Voila!

How to customize formatting for each rich text

Headings, paragraphs, blockquotes, figures, images, and figure captions can all be styled after a class is added to the rich text element using the "When inside of" nested selector system.

Author’s Details

Rajnish Das

Rajnish Das is an in-house writer at SmartWriter and SmartLead. She writes product-oriented, data-driven content for B2B SaaS audiences and educates them on marketing and sales topics. Her expertise includes outbound marketing techniques like cold emailing and LinkedIn outreach.


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