PURPOSE
Allow alias domains to be multiple, notably to be used in a multi company
environment where each company has its own alias domain.
SPECIFICATIONS: MAIL.MAIL
Update MailMail to use alias domains. Notably "Return-Path" headers are
now computed based on alias domain when possible, using the recently added
fields on 'mail.message' model for that purpose. Fallback is to use current
company's bounce email when mail_mail creation is done outside of classic
mail flows or without that information.
SPECIFICATIONS: IR.MAIL.SERVER
Update IrMailServer and low-level stack to use alias domains. This has an
impact notably on default values computation for from and bounce emails
* '_get_default_bounce_address' is called when there is no 'Return-Path'
given. Most classic mail flows will set it according to current record
company / alias domain. Fallback when not set is to fallback on current
company's bounce email, computed based on its alias domain;
* '_get_default_from_address' is used in two use cases
* computing a default 'email_from' for outgoing emails when it is not set.
In most classic mail flows it is set based on current user's email. If
not set fallback on current company's notification emails is considered
as a safe bet, replacing the global configuration parameter;
* overriding the 'email_from' of emails that are considered spoofing the
mail server, allowing to wrap the sending into a 'notifications@domain'
generic sender. For those we should try to keep record's information as
it may be called in classic mail flows;
* '_get_default_from_filter' is added in base and overridden in mail to
either use 'mail.default.from_filter' ICP, or use the one defined on
the alias domain. Supporting both is still an option, as its behavior
is implemented for basic email sending, without mail being available.
Those methods are updated to try to support multi domains / multi company
setup. However as those defaults are located ar ir.mail_server level it is
not always easy to have complete environment information, hence fallbacking
on current company's parameters when no better information is provided.
A test about 'mail.default.from' is removed, as it was testing a default_from
outside of catchall domain. It is not possible anymore as default_from is now
part of domain definition. As multi domains is supported, no need to support
exotic configuration like that.
SPECIFICATIONS: FROM MAIL.MAIL TO OUTGOING EMAILS
When sending emails based on MailMail, we now prepares sending groups based
on MailServer, email_from, but also alias domain to which the mail belongs to.
Information about alias domain (e.g. notifications email based on default_from
and bounce email) is propagated to low-level email preparation methods. It
uses the context as it is the easiest way to propagate information to that
level without hacking too much models or calls.
Task-36879 (Mail: Support Multi Domains Aliases)
Part-of: odoo/odoo#76734
Thibault Delavallée
9345060498