Zoho IMAP Settings: A Complete Guide for Seamless Email Integration

Connecting Zoho Mail to Outlook, Apple Mail, Thunderbird or a third-party tool takes about five minutes, provided you use the right server names. Most of the time people fail, it's one of three things: the wrong data centre hostname, the wrong outgoing server for a paid account, or IMAP simply not switched on yet.

Here are the settings, and the fixes for what usually goes wrong.

Zoho Mail IMAP settings (incoming)

Server: imap.zoho.com

Port: 993

Security: SSL required

Username: your complete email address, not just the part before the @

Zoho Mail SMTP settings (outgoing)

This is where most setups break, because the outgoing server is not the same for everyone.

If you are on a paid organisation plan with a domain-based address (you@yourcompany.com), your outgoing server is smtppro.zoho.com. Not smtp.zoho.com. This single detail accounts for a large share of "my mail receives but won't send" problems, and plenty of guides online still get it wrong.

If you are a personal user (username@zohomail.com) or on a free organisation plan, your outgoing server is smtp.zoho.com.

Port: 465 with SSL, or 587 with TLS. Either works. What does not work is mixing them up, such as 587 with SSL selected, which fails to connect.

Authentication: required. Zoho refuses unauthenticated outgoing mail, so if your client has an option to send without authentication, it must stay off.

Check your data centre before you copy anything

Zoho runs separate data centres and your account lives in exactly one of them. The hostname changes accordingly, and using the wrong one fails every time regardless of how correct the rest of your settings are.

Europe uses imap.zoho.eu and smtp.zoho.eu. India uses imap.zoho.in and smtp.zoho.in. Australia, Japan, Canada and Saudi Arabia follow the same pattern with .com.au, .jp, .ca and .sa. The United States uses the plain .com addresses.

The ports never change. Only the hostname does.

If you are not sure which applies to you, don't guess. Log in to Zoho Mail, go to Settings, then Mail Accounts, and click your address. Zoho shows the exact server configuration for your account and data centre.

Turn IMAP on first

IMAP access is a setting, and it is not always on by default. In Zoho Mail, go to Settings, then Mail Accounts, click your email address, and enable IMAP Access in the IMAP section.

Two options in that section are worth understanding before you save.

Auto-Expunge. With it checked, deleting or moving an email in your client removes it from the Zoho server too. Unchecked, messages stay until they are manually expunged from the client. If several people share access to a mailbox, think about which behaviour you actually want.

Include Archived emails. Off by default. Turn it on and archived mail appears in your client inside the folders it was archived from. Leave it off and users will tell you their old email has vanished.

One important limitation: IMAP access is not available to newly signed-up free plan users. Free accounts are intended to be used through the Zoho Mail web client and mobile apps. If the IMAP option isn't there at all, that is usually why, and the fix is a paid plan rather than a settings change.

If two-factor authentication is on, your password will not work

With 2FA enabled, Zoho refuses your normal account password from an email client. You need an application-specific password instead.

Generate one at accounts.zoho.com under Security, then Application-Specific Passwords, and paste that into your mail client instead of your usual password. Each client should get its own, so revoking one doesn't break the others.

Common errors and what they actually mean

Authentication failed. Usually the username. Use the complete email address. If that is already right, check whether 2FA is on and you need an app-specific password.

Mail receives but will not send. Almost always the outgoing server. A paid domain account needs smtppro.zoho.com. Check authentication is switched on for outgoing mail too.

553 Relaying disallowed. You are sending from an address that isn't the authenticated account or one of its configured aliases. Zoho enforces this strictly.

Cannot connect at all. Check the hostname against your data centre, then check the port and security method match. Port 465 pairs with SSL and 587 pairs with TLS. Some office networks and ISPs also block port 465 outright, in which case try 587.

Folders missing or not syncing. Folder subscriptions in your client. Most clients subscribe to the inbox only and need the others enabled manually.

IMAP or POP?

Use IMAP. It keeps the mailbox synchronised across every device, so a message read on your phone shows as read on your laptop, and folders stay consistent everywhere.

POP, on port 995, downloads messages to one device and by default removes them from the server. It made sense when storage was expensive. For a business mailbox today it mostly creates the problem where someone's email exists only on a laptop that has since been replaced.

Frequently asked questions

What is the IMAP server for Zoho Mail?

imap.zoho.com on port 993 with SSL, using your full email address as the username. If your account is in another data centre the hostname changes to imap.zoho.eu, imap.zoho.in, imap.zoho.com.au and so on. The port stays 993.

Why is my Zoho Mail receiving but not sending?

Usually the outgoing server. Paid organisation accounts with a domain-based address use smtppro.zoho.com, not smtp.zoho.com. Also confirm authentication is enabled for outgoing mail, because Zoho rejects unauthenticated sending.

Which port should I use for Zoho SMTP?

465 with SSL or 587 with TLS. Both work. The pairing matters, so selecting 587 with SSL or 465 with TLS will fail. If your network blocks 465, use 587.

Can I use IMAP on the Zoho Mail free plan?

Not on newly created free accounts. Zoho restricts IMAP access on the free plan, which is meant to be used through the web client and mobile apps. Connecting a desktop client requires a paid plan.

Do I need an app password for Zoho IMAP?

Only if two-factor authentication is enabled on the account. In that case your normal password is refused and you generate an application-specific password at accounts.zoho.com under Security.

If this is one mailbox, it's a five-minute job

If it's forty mailboxes, a domain move, or a migration from another provider with years of mail to carry across, it stops being a settings exercise and becomes a project. That is the part we get called about: getting mail off an old provider without losing anything, keeping the domain records right so messages still arrive, and doing it without a day of downtime.

We're a Zoho Premium Partner with offices in Chennai and Dubai. If you're planning a mail migration, read how we handle Zoho Mail or tell us what you're moving.