Time for a sneak peek at a new feature coming soon to your MailBuild account. If your clients are importing files fairly often, but have no way of just importing the new ones and not existing addresses, you may have run into this problem:

What about all the people who unsubscribed before? Will they be reimported and start getting email again? MailBuild has always been smart enough to remember unsubscribed people as long as you import into the same list each time, but not every client does that.

Suppression lists are the answer - it's like a special list for each client, that remembers all the people who have unsubscribed, been manually removed, or bounced out of any list that client has. Then when your client imports a new file, MailBuild checks all the addresses to see if they are in the suppression list, and if so, discards them from the import.

There's a message to tell you what happened, and you can remove people from the suppression list if you have their permission to email them again. We'll be releasing suppression lists in your account within the next few weeks - watch the blog for an announcement.