Why do some emails return as spam?
Some organisations keep track of email spam so email providers and ISPs can use it to prevent spam from being delivered to their users. Occasionally, Virgin Media is listed by these organisations, perhaps because people are trying to use our network to send spam. Unfortunately, this can cause delivery problems for Virgin Media Mail messages because some email providers or ISPs reject all messages sent from services on these lists.
Spam lists never intend to block all Virgin Media Mail messages, but unfortunately it still happens. As a result, some messages sent from Virgin Media Mail might be delayed, or even bounced back (in which case you would receive a failed delivery notification).
We take every measure to make sure that all valid messages are delivered, and we're working hard to keep delivery problems to a minimum. While we continue to address this problem, we ask that Virgin Media Mail users experiencing delivery delays or Virgin Media Mail users whose messages are bouncing back to their accounts, to please inform the recipient's mail provider about the issue.