Migration to version 18.0

[OCA-git-bot]

Todo

https://github.com/OCA/maintainer-tools/wiki/Migration-to-version-18.0

Modules to migrate

• base_search_mail_content
• mail_activity_board
• mail_activity_done
• mail_activity_reminder
• mail_activity_team
• mail_attach_existing_attachment
• mail_composer_cc_bcc
• mail_composer_cc_bcc_account
• mail_debrand - By @jdebetaz - [18.0][MIG] mail_debrand: Migration to 18.0  #1479
• mail_notification_custom_subject
• mail_optional_autofollow
• mail_outbound_static
• mail_partner_forwarding
• mail_partner_opt_out
• mail_send_confirmation
• mail_template_substitute
• mail_tracking - By @trisdoan - [18.0][MIG] mail_tracking: Migration to 18.0 #1476
• mail_tracking_mailgun
• mail_tracking_mass_mailing - By @trisdoan - [18.0][MIG] mail_tracking_mass_mailing: Migration to 18.0 #1478
• mass_mailing_partner
• mass_mailing_resend

Missing module? Check https://github.com/OCA/maintainer-tools/wiki/%5BFAQ%5D-Missing-modules-in-migration-issue-list

[trisdoan]

mail_tracking: #1476

mail_tracking_mass_mailing: #1478

[pedrobaeza]

I think that for this version, we should leave this repository for social things like Facebook, Instagram, X connectors and so (there are some to come from Binhex), and put things in a new repository OCA/mail.

What do you think?