How to correctly configure Zoho Mail SMTP in Odoo 18? Getting “please run connect() first” error

Question

I am trying to configure *Zoho Mail SMTP* in *Odoo 18 (Windows 11, local installation)* but Odoo fails to send emails even though “Test Connection” is successful.
**SMTP settings used:**
*SMTP Server:* smtppro.zoho.in
*Port:* 465
*Encryption:* SSL/TLS
*Username:* full Zoho email
*Password:* app password
*Outgoing email domain:* configured
Odoo shows *Test Connection: SUCCESS*, but when I try to send an actual email (quotation, reset password, etc.) I get:
SMTPServerDisconnected: please run conne

Kunjan Patel · Answer

Hello ZAMEEL ISMAIL
I Hope You are doing well,
Here is your final working setup summary of it for solved the "run connect() first error":
SMTP Server *smtp.zoho.in*
Port *465*
Encryption *SSL/TLS*
Username Full Zoho email
Password Zoho app password (Zoho → My Account → Security → App Passwords → Generate)
From Filter Same as user
User Email Must match Zoho email
DNS SPF + DKIM + DMARC   Hope this information helps you.
Thanks & Regards,
*Kunjan Patel*

Codesphere Tech · Answer

Hello,
Please refer this official documentation which is very helpful for you.
https://www.odoo.com/documentation/18.0/applications/general/email_communication/email_servers_outbound.html#using-a-custom-domain-to-send-emails [1]

[1] https://www.odoo.com/documentation/18.0/applications/general/email_communication/email_servers_outbound.html#using-a-custom-domain-to-send-emails

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