Comments
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We were able to have a working solution where SonicWall support changed a setting in global settings: "I changed one item that should help here as Chunking is a requirement for BDAT which is what we are dealing with." Hopefully, the sender is updating their software soon
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I opened a case and this is the last response I got today: As I stated Email Security does not alter these types of messages. The NDR or reject is being sent from O365 not HES. The only way to resolve it is to make it so the Template Is not Using The Line Breaks in the middle of the message.
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Currently, we have same issue when someone tries to send an auto-generated message over M365 to our SonicWall email security. I checked the "BareLineFeedsAreIllegal" on the exchange servers but from my understanding, the mail gets rejected by email security @SonicAdmin80 Could you ever solve the problem? Thanks