In my odoo18 instance i tried to configure new out going mail server iam using zohomail.
I tried with mail password and also by generating app password but it shows

Invalid Operation

Server replied with following exception: (535, b'Authentication Failed')

when tested

My configuration is

Authenticate with : Username

Connection Encryption :   TLS (STARTTLS), encryption only 

SMTP Server : smtp.zoho.com
SMTP Port : 587

Any solution for this ?