Email Compliance List Unsubscribe Header Assumptions & Limitations
There are some assumptions and limitations to be aware of when using the List Unsubscribe Header.
- Merge Fields
- Merge fields from the contact object are supported and need to be entered with the syntax {!Contact.FIELD}
- EX: https://unsub.example.com/unsub/me?contact={!Contact.Id}&name={!Contact.Name}
- For long values over 255 characters, the value should be placed in a field/formula on the contact object and specified as a merge field
- Merge fields from the contact object are supported and need to be entered with the syntax {!Contact.FIELD}
- {!Contact.Id} will be resolved to the 15 character Salesforce Id. To use the 18 character Salesforce Id, use {!CASESAFEID(Contact.Id)}
- Different email clients
can handle the unsubscribe headers differently and might only support one, or both URL and mail-to implementations. Check with the email providers to see what they support.
- List-Unsubscribe header will not be added if the 2020 Email Editor Send as a single email to all recipients checkbox is enabled.
- Adding List Unsubscribe Header to emails is only supported for emails sent out to Contacts
entered in the email To field.
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