Creating a suppression list or blocklist
We don't offer a global suppression or blocklist. Instead, we recommend importing your suppressed contacts into your list as unsubscribed:
When importing contacts, there is an option of whether the contacts should have a status of subscribed or unsubscribed. If you have unsubscribed emails to Import, separate the two list files, then import them into the same list of contacts. Import your exclude list with the status unsubscribed. This will prevent those contacts from being re-subscribed if they are inadvertently imported into your list in the future.
If you'd like it to affect currently subscribed contacts, make sure to choose the option to update existing contacts too.
All unsubscribed contacts are at a list level, as opposed to a global account level. If you have multiple lists, you'd need to import your exclude list to each list separately.
In most cases, we recommend keeping all your contacts on the same list. If you have multiple lists and would like to merge them, see how to do it here.