Backup is designed to store copies of messages which Kaspersky Secure Mail Gateway saves during processing. Copies of messages are stored in Backup in unreadable format and therefore do not compromise your computer's security.
Kaspersky Secure Mail Gateway places copies of the following messages in Backup:
Messages to which the Anti-Virus engine assigned one of the following status labels: Infected,Probably infected, Corrupted, or Encrypted and before one of the following actions is taken on it:Disinfect, Delete attachment, or Delete message;
Messages to which the Anti-Spam engine assigned one of the following status labels: Spam, Probable spam, Blacklisted, or Massmail and before the Delete message action was taken on it;
Messages to which the Anti-Phishing engine assigned one of the following status labels: Phishing or Malicious link and before the Delete message action was taken on it;
Messages to which one of the following status labels was assigned after content filtering: Banned File Name or Banned File Format and before the Delete attachment or Delete message action was performed on it, and also messages assigned Size Exceeded status and before the Delete message action was taken on them;
Messages whose senders' addresses have been detected in a custom black list of addresses and before the Delete message action was taken on them.
Copies of messages are placed in Backup together with attachments.
The default maximum Backup space is 7.32 GB. As soon as this threshold value is exceeded, the application starts to remove the oldest copies of messages from Backup. When the amount of occupied space is again below the threshold value, the application stops removing copies of messages from Backup.