In the email message, usually in the footer, an unsubscribe link is provided. A cancellation handled outside MailUp generally follows either of these procedures:
- A link to an URL pointing to an external unsubscribe page is inserted into the email message;
- The message contains a procedure allowing the user to unsubscribe (e.g. "To unsubscribe please send an e-mail to [...] with "UNSUBSCRIBE" as a subject header").
In order to keep the database updated and avoid sending unsolicited messages to users who unsubscribed, MailUp administrator must then remove the address from subscribers in one of the following ways:
- Manual import of unsubscribers list (in csv/txt format)
- Call to API procedure xmlUnSubscribe.aspx (see GET/POST API Specifications)
- User manual unsubscribe via MailUp interface
- Manual import of unsubscribers list (through copy and paste)
- Automatic import of a list of users to be unsubscribed via Batch FTP procedure (i.e. every night)
As an alternative, the administrator can avoid removing those users, but before every mailing a list of contacts without the unsubscribers must be imported to MailUp in a specific group, and the message must be sent to that group only. This procedure is more risky anyway, as the chances of sending an unsolicited message to a user who chose to unsubscribe are higher.