Microsoft Exchange 5.5 allows a remote attacker to relay email (i.e. spam) using encapsulated SMTP addresses, even if the anti-relaying features are enabled.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Exchange_server | Microsoft | 5.5 (including) | 5.5 (including) |
| Exchange_server | Microsoft | 5.5-sp1 (including) | 5.5-sp1 (including) |
| Exchange_server | Microsoft | 5.5-sp2 (including) | 5.5-sp2 (including) |