Hi Thomas,

Have you set the outgoing servers in Odoo?

When using multiple email addresses for different purposes in Odoo, it’s important to configure separate outgoing mail servers. By default, Odoo uses notifications@yourdomain.com for all outgoing emails, but this can be customized as mentioned by the support team.

Follow the official documentation to define outgoing mail servers:

👉 Odoo 18.0 Outgoing Mail Server Setup

Suppose you want to use different addresses for sales and general notifications:

1. Add a mail outgoing server for sales@yourdomain.com:
   • In the "From Filtering" field, enter:
     • sales@yourdomain.com
     • Optionally, add related addresses like vendor@yourdomain.com (e.g., users from the Sales team).
   • Odoo will use this server when the sender matches one of the filtered addresses.
2. Add another mail server for notifications@yourdomain.com:
   • Leave the "From Filtering" field empty.
   • This server will act as a fallback. Any email not matching the filters above will be sent using this default server.

In conclusion you'll have to create for each address an outgoing server, else every mail with no specific server will be sent from notifications@yourdomain.com.