Unsubscribe option via list unsubscribe
Email mailbox providers such as Google, Microsoft or GMX offer your customers the option to cancel newsletter subscriptions without having to open the mail or search for an unsubscribe option.
For this purpose, a "List-Unsubscribe" entry is added to the header area of the e-mailings.
This list unsubscribe usually uses the system's default logoff, as it is done with {$GRANT_URL}.
Transactional Mailing
If it is a transactional e-mailing, which does not require an unsubscribe link because no promotional content is sent, no unsubscribe link needs to be provided in the mail header.
Further details can be found in the ECOS guide and on the page transactional mails.
Alternative logoff scenarios
If a special unsubscribe logic is required, the list-unsubscribe unsubscribe link can be replaced by a webhook in the future. This will be set up by SC-Networks.