How To Disable DSN Success Messages
Last updated on JUNE 10, 2017
Applies to:Oracle Communications Messaging Server - Version 7.0.4 and later
Information in this document applies to any platform.
Spammers are creating large scale joe-job attacks by specifying an e-mail address for DSN-Success messages that does not belong to them. Spammer sends message to legit user and it gets through all filtering and is delivered. Spammer has set DSN-Notify for successful delivery to go to a third party, effectively joe-jobbing that third party with excessive amount of DSN-Notify success messages ...
So we want to stop that. I understand the NOTARY mechanism can't be completely turned off ... so what can we do? Maybe discard all DSN-Notify success messages at the outbound MTAs?
Also, could you give me a pointer on how we would implement the rejection just for unauthenticated senders?
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