/ Journal. The Odoo knowledge library

Upgrades and customization

Upgrade-safe builds, automation rules, and where Studio stops and real development starts.

Access rights vs record rules in Odoo: why a user can or cannot see something

Access rights vs record rules in Odoo: why a user can or cannot see something

Whether a user can or cannot see something in Odoo is decided in two layers: access rights decide if they may touch a model at all, record rules decide which rows inside it they get. A salesperson who...

Jun 12, 2026

Outgoing email not sending in Odoo (the port 25 and SPF/DKIM fix)

Outgoing email not sending in Odoo (the port 25 and SPF/DKIM fix)

Odoo email that does not arrive has two causes: the SMTP connection is blocked (usually the port) or the receiving side does not trust the mail (SPF, DKIM, DMARC). Fix the port first, then the DNS rec...

Jun 10, 2026

Why your Odoo is slow (and the practical fixes)

Why your Odoo is slow (and the practical fixes)

A slow Odoo is almost always one of four things: a worker count left at the default, too little RAM for those workers, a missing database index, or custom code doing expensive work on every load. All ...

May 6, 2026

Odoo Studio vs custom development: where Studio stops and code begins

Odoo Studio vs custom development: where Studio stops and code begins

Studio stops where real logic begins. Use it for fields, view tweaks and one-sentence rules, and move to a custom module the moment a change branches, talks to another system, processes volume or has ...

Apr 14, 2026

Why your Odoo upgrade broke your customizations (and how to build upgrade-safe)

Why your Odoo upgrade broke your customizations (and how to build upgrade-safe)

An upgrade breaks customizations because Odoo migrates its own code and data, not yours. Building upgrade-safe comes down to staying close to standard, keeping custom work contained, and testing every...

Mar 22, 2026