Unsubscribe sources

All marketing campaigns are sent only to confirmed users by default, but you can adjust segment conditions and reach unsubscribed users.

Unsubscribe Reason	Unsub Source ID	Explanation	Reject Applied	Trigger	System	Documentation
UNSUB_SOURCE INVALID	10	Invalid email address / user mailbox does not exist.	invalid	❌	❌	Unsubscribing for other reasons
UNSUB_SOURCE MX_INVALID	12	Invalid sender domain (part of the email address after @ symbol).	invalid	❌	❌	Unsubscribing for other reasons
UNSUB_SOURCE DISTANCE_BOUNCE	15	Mail server cannot accept this email (user mailbox is full, or account is blocked).	invalid	❌	❌	-
UNSUB_SOURCE CLIENT_CALLBACK	8	The user has been removed from the project or unsubscribed in the client's system.	unsubscribe	❌	✅	Unsubscribe
UNSUB_SOURCE SETTINGS_TYPES	9	The user unsubscribed through the product settings (e.g. all checkboxes are unchecked in the account).	unsubscribe	❌	✅	Unsubscribe users from email types
UNSUB_SOURCE FBL	2	The user was unsubscribed due to spam complaints to the mail server.	unsubFBL + exception not_skip_reject fbl_by_mail_type	❌	❌	-
UNSUB_SOURCE LIST_HEADER	5	The user unsubscribed through the email header via the mail server.	unsubscribe	❌	✅	Unsubscribing for other reasons
UNSUB_SOURCE ADMIN	16	The user unsubscribed through the Sendios admin panel.	unsubFBL + exception not_skip_reject fbl_by_mail_type	❌	❌
UNSUB_SOURCE PAGE	19 [regular] 1[campaign]	The user unsubscribed through the Sendios unsubscribe page (unsubscribe link in the email's footer). If the user has only unsubscribed from marketing campaigns, the rejection does not take effect (the user is just not included in the marketing selection).	unsubscribe	❌	✅	Unsubscribing via the link in the email
N/A	N/A	Unsubscribe from a specific type of email, rather than from the entire category. In the admin panel, a specific type will be displayed without the unsub_source.	unsubByType	❌ (specific type)	✅	Unsubscribe users from email types