Unsubscribers are email addresses that will not receive newsletters even if they are selected when setting up an email campaign or automatic sending.

The reasons for unsubscribing can be voluntary (e.g. click on the unsubscribe link), or for reasons of managing the subscriber database (both by the account administrator and by the platform).

Unsubscribe type

Type	Description	Error code (visible in recipient export files)
Admin action	Unsubscribed by the administrator by changing the recipient status	0 or 01
From import	Unsubscribed during the import process, by selecting the advanced option Import as unsubscribed (opted out).	4/42 or 41
Due to right to be forgotten	Unsubscribed by the administrator after that the user has exercised the right to unsubscribe with the right to be forgotten and subsequently erasure of personal data collected.	1024
From message (unsubscribe link)	Unsubscribed by the user by clicking on the unsubscription link included in your message.	2/20/21/22
From mail client: link (recipient action)	Recipients unsubscribed through a unsubscribe button in the webmail client (e.g. Yahoo, Gmail etc.).	32/321
From mail client: mailto (recipient action)	Recipients unsubscribed by sending an email to their ISP/webmail provider.	64/640/641/642
Due to SPAM complaint	Recipients clicking the "spam" button in the webmail client (e.g. Yahoo, Gmail etc.).	16/161/162
Due to inactive recipient	Users who have not performed any activity in the latest period. More info	128
Due to wrong email	Automatic unsubscription due to incorrect email. More info	8 or 80
Due to wrong email (incorrect syntax)	Email addresses with syntax errors (e.g. without a "@")	81
Due to wrong email (domain no longer exist)	Email related to a no longer existing domain	82
Due to wrong email (box abandoned)	Email address that was abandoned by the user. More info	83
Due to blocked email	Email blocked. More info	256
Due to blocked email (destination MTA block)	Email blocked due to known spammer. More info	2561
Due to blocked email (spam content)	Email blocked due to spam content detected. More info	2562
Due to blocked email (destination MTA configuration problems)	Email blocked due to recipient configuration error. More info	2563
Due to repeated bounces	Email automatically unsubscribed due to repeated soft bounces. More info	512
Due to repeated bounces (temporary unsubscribe)	Email temporarily unsubscribed due to repeated soft bounces. More info	5121
Due to repeated bounces (permanent unsubscribe)	Email permanently unsubscribed due to repeated soft bounces. More info	5122