If you receive this error while logged into your campaign manager, then it is likely a campaign you have sent received multiple spam complaints or a high number of bounced e-mails.
It appears a list you imported is was purchased, not created organically through your own efforts and networking.
Your most recent campaign received spam complaints
Your most recent campaign looked "spammy" and we're trying to prevent spam complaints
You appear to be "cold e-mailing" or sending to prospects who never gave you permission.
Your most recent campaign violates our Terms of Use in some way.
Your most recent campaign contains unacceptable content or something offensive.
Something else looks too risky for our comfort and we've gotta check it out.
If you're account was suspended, please submit a support request for review of your account, at www.linkusupport.com. We will review your e-mail campaign and determine if it meets the terms of service of the LinkU campaigner service and if so re-activate your campaigner account. Otherwise, if not, we cannot re-enable the account until the problem campaigns and lists are removed from our system. We may also place a sending limit on your account until further notice.
To avoid being suspended for bounced e-mail, it is recommended to have your list cleaned BEFORE you import your contact list to the campaign manager, through an e-mail validation service such as http://www.briteverify.com.