550 5.7.64 Relay Access Denied ATTR36

%3CLINGO-SUB%20id%3D%22lingo-sub-730684%22%20slang%3D%22en-US%22%3E550%205.7.64%20Relay%20Access%20Denied%20ATTR36%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-730684%22%20slang%3D%22en-US%22%3E%3CP%3EDear%20Sir%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EWe%20are%20seeing%20%3CSTRONG%3ESMTP%20%3B%20550%205.7.64%20TenantAttribution%3B%20Relay%20Access%20Denied%20%5BOS2JPN01FT010.eop-JPN01.prod.protection.outlook.com%5D%3C%2FSTRONG%3E.%20while%20sending%20emails%20from%20relay%20using%20(Java%20program)%20tomcat%20server.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThank%20you%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ER.Bala%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-730684%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EAdmin%20center%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%20Administration%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%20Management%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-731968%22%20slang%3D%22en-US%22%3ERe%3A%20550%205.7.64%20Relay%20Access%20Denied%20ATTR36%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-731968%22%20slang%3D%22en-US%22%3E%3CP%3ELiterally%20the%20first%20result%20in%20search%3A%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexchange%2Ftroubleshoot%2Fconnectors%2Frelay-access-denied-smtp%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexchange%2Ftroubleshoot%2Fconnectors%2Frelay-access-denied-smtp%3C%2FA%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EAs%20detailed%20in%20the%20article%2C%20to%20relay%20messages%20via%20O365%2C%20you%20need%20a%20connector%2C%20verified%20either%20by%20a%20certificate%20or%20restricted%20to%20specific%20IP%20address.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-772981%22%20slang%3D%22en-US%22%3ERe%3A%20550%205.7.64%20Relay%20Access%20Denied%20ATTR36%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-772981%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F58%22%20target%3D%22_blank%22%3E%40Vasil%20Michev%3C%2FA%3E%26nbsp%3B%20Absolutely%20Correct%2C%20Best%20Answer%3C%2FP%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexchange%2Ftroubleshoot%2Fconnectors%2Frelay-access-denied-smtp%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexchange%2Ftroubleshoot%2Fconnectors%2Frelay-access-denied-smtp%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E
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Occasional Contributor

Dear Sir,

 

We are seeing SMTP ; 550 5.7.64 TenantAttribution; Relay Access Denied [OS2JPN01FT010.eop-JPN01.prod.protection.outlook.com]. while sending emails from relay using (Java program) tomcat server.

 

Thank you

 

R.Bala

2 Replies
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Literally the first result in search: https://docs.microsoft.com/en-us/exchange/troubleshoot/connectors/relay-access-denied-smtp

 

As detailed in the article, to relay messages via O365, you need a connector, verified either by a certificate or restricted to specific IP address.

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