We've been getting the following block message and require de-listing assistance. We've already submitted de-list request through the Whitelist form but have not yet received any response.
"571 Email from xx.xx.xxx.xxxx is currently blocked by Verizon Online's anti-spam system. The email sender or Email Service Provider may visit http://www.verizon.net/whitelist and request removal of the block. 141030"
Equally important, we'd like to understand exactly what specifically had caused the IP to be listed so that we can resolve the root cause of this listing. Mailings are sent to subscribed non-profit members so the mailing behavior should not have constituted a block.