EXPLANATION:
There is at least one domain in your email that is generating substantial complaints from AOL members. AOL blocks emails that contain domains that may have been previously used to send unsolicited email or inappropriate content such as personal information solicitations (phish).
These blocks are content-based, and are issued to any email that contains the blocked domain anywhere in the email message body source code. The blocks can target domains in both HTML and plain text emails. There is no need to unsubscribe individual recipients from mailing lists that generate this bounce. The recommended solution is to isolate the blocked domain and open a support request. Please wait a day and try to reproduce the issue before you contact us for unblocking. Many HVU-related blocks are resolved on their own
To help identify the blocked domain, you may want to try sending test emails to a test AOL account using one domain/URL in each email. The email that gets the HVU:B1 bounce contains the blocked URL. Another method would be to establish a manual SMTP session with AOL using telnet, and inserting each possible domain after the "DATA" portion. When the attempt is made to send the blocked one, an HVU:B1 error will be generated. Instructions for manual SMTP testing can be found here.
SOLUTION:
If you believe you own the blocked domain(s) from your email or if you are having trouble determining which domain is blocked, please file a support request. If you do not own the domain, please have the owner of that domain contact us.
