Emails failing in applications after migrating to the cloud

%3CLINGO-SUB%20id%3D%22lingo-sub-820743%22%20slang%3D%22en-US%22%3EEmails%20failing%20in%20applications%20after%20migrating%20to%20the%20cloud%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-820743%22%20slang%3D%22en-US%22%3E%3CP%3EAfter%20we%20migrated%20from%20exchange%20on-prem%20to%20the%20cloud%2C%20emails%20being%20sent%20from%20applications%20we%20developed%20are%20failing.%26nbsp%3B%20Can%20anyone%20point%20me%20in%20the%20right%20direction%20of%20what%20to%20look%20at%20or%20change%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThanks%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-820743%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-821369%22%20slang%3D%22en-US%22%3ERe%3A%20Emails%20failing%20in%20applications%20after%20migrating%20to%20the%20cloud%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-821369%22%20slang%3D%22en-US%22%3EYou%20haven't%20provided%20enough%20information%20about%20your%20setup%20to%20advice%20anything.%20We%20have%20used%20a%20relay%20this%20way%20%3CA%20href%3D%22https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2FExchange%2Fmail-flow-best-practices%2Fhow-to-configure-iis-for-relay-with-office-365%3FredirectSourcePath%3D%25252fen-us%25252farticle%25252fHow-to-configure-IIS-for-relay-with-Office-365-eb57abd2-3859-4e79-b721-2ed1f0f579c9%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fdocs.microsoft.com%2Fen-us%2FExchange%2Fmail-flow-best-practices%2Fhow-to-configure-iis-for-relay-with-office-365%3FredirectSourcePath%3D%25252fen-us%25252farticle%25252fHow-to-configure-IIS-for-relay-with-Office-365-eb57abd2-3859-4e79-b721-2ed1f0f579c9%3C%2FA%3Eso%20it%20is%20an%20internal%20server%2C%20all%20applications%20send%20emails%20to%20it%20and%20it%20securely%20relays%20them%20through%20EO.%20But%20it%20looks%20like%20there%20are%20already%20a%20few%20options%20to%20do%20a%20some%20what%20direct%20sending%20now%20(a%20few%20years%20later)%20%3CA%20href%3D%22https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2FExchange%2Fmail-flow-best-practices%2Fhow-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-3%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fdocs.microsoft.com%2Fen-us%2FExchange%2Fmail-flow-best-practices%2Fhow-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-3%3C%2FA%3E%3C%2FLINGO-BODY%3E
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Occasional Contributor

After we migrated from exchange on-prem to the cloud, emails being sent from applications we developed are failing.  Can anyone point me in the right direction of what to look at or change?

 

Thanks

1 Reply
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You haven't provided enough information about your setup to advice anything. We have used a relay this way https://docs.microsoft.com/en-us/Exchange/mail-flow-best-practices/how-to-configure-iis-for-relay-wi... so it is an internal server, all applications send emails to it and it securely relays them through EO. But it looks like there are already a few options to do a some what direct sending now (a few years later) https://docs.microsoft.com/en-us/Exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-dev...