Add a Zoho Mail account to Thunderbird with manual configuration. Select Account Actions then Add Mail Account. Click Manual Configuration and edit the server names and ports. Click Re-test before you finish. Mozilla gives no Zoho server values on this page. Steps follow the official page and were not tested here.
Zoho Mail needs server names that Thunderbird cannot always find on its own. Mozilla documents a manual route for providers outside its automatic list.
Facts follow Mozilla Support Manual Account Configuration. Mozilla updated it on September 29, 2025. Mozilla names no email provider except a Gmail example.
When do You Need Manual Configuration?
Mozilla says manual setup is needed when your provider is not in the automatic configuration database or your setup is unusual.
How to Add Zoho Mail to Thunderbird Manually?
- Open Account Settings from the Tools or Edit menu.
- Click Account Actions at the bottom of the left pane and select Add Mail Account.
- Enter your email details and click Continue. Thunderbird tries to detect settings from your domain.
- Click Manual Configuration and edit the server names, ports and IMAP or POP type.
- Click Re-test. Valid settings respond quickly. When the test fails, click Stop, edit the settings and click Re-test again.
How to Set up the Outgoing Server?
- Select Outgoing Server (SMTP) at the bottom of the left pane.
- Edit the existing entry or add a new one.
- Select your account and choose the SMTP server in the Outgoing Server (SMTP) field.
- Open Server Settings under your account and confirm the values match your provider.
Multiple accounts can share one SMTP server. Mozilla states that SMTP servers are created separately from accounts.
Which Fields do You Fill in?
- Incoming server. Hostname and port. Mozilla shows POP on 110 and IMAP on 143 as examples.
- Outgoing server. Hostname and port. Mozilla shows 25 as an example.
- Connection security. STARTTLS or SSL/TLS.
- Authentication. Sign in method plus a username and password.
According to Mozilla, an automatic account that uses IMAP can switch to POP through a separate FAQ.
What does Mozilla Not Say?
- Zoho server names or ports.
- Steps to enable IMAP inside Zoho Mail.
- App password steps for Zoho.
- Steps to import old Zoho mail into Thunderbird.
Related reading: how to import Gmail to Thunderbird and how to reindex Thunderbird folders.
Frequently Asked Questions
How do I Add Zoho Mail to Thunderbird?
Select Account Actions then Add Mail Account. Click Manual Configuration and enter the server names and ports from Zoho.
Does Mozilla List Zoho Server Settings?
No. Mozilla shows a Gmail example only and tells you to match your provider values.
What does Re-test do in Thunderbird?
Re-test checks the settings you typed. Mozilla states that valid settings respond quickly.
Can Two Accounts Share One SMTP Server?
Yes. Mozilla states that multiple accounts can share one SMTP server.
Do I Need Manual Setup for Every Provider?
No. Mozilla states that manual setup is needed when the provider is not in the automatic configuration database.
Key Takeaways
- Manual configuration serves providers outside the automatic list.
- Select Account Actions then Add Mail Account to start.
- Re-test confirms the server settings before you finish.
- SMTP servers are separate from accounts.
- Mozilla gives no Zoho values on this page.
Sources and References
Facts follow Mozilla Support.
- Manual Account Configuration (Mozilla Support) support.mozilla.org