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By default MailMarshal enforces a SMTP hop count limit of 25 hops. Any message that has more than 25 Received: entries in the headers is suspected of being looped between servers.
Before changing the limit, examine email headers and routing to verify that the large number of hops is legitimate.
Warning: Using the Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Trustwave cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Make sure that you back up your Registry prior to making any changes.
To change the hop count limit:
Data Type = DWORD Value Name = MaxHopCount Value (Decimal) = the required number of hops
To apply this change:
The Default part of the Registry path could also be Default(1) or similar.
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