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Greylisting mode enum
Description
Enable or disable greylisting. If greylisting is activated, the first email from an unknown sender will be rejected at first. Mails from this sender will only be accepted after a further delayed delivery attempt.
Possible values
For XML:
- ENABLED = activated
- DISABLED = deactivated
For JSON:
- TRUE= activated
- FALSE= deactivated
Please note that the greylisting may cause a time delay in the delivery of emails.