535 5.7.3 Authentication unsuccessful

February 12, 2019

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Hello

You send Smtp Mail to Exchange Server , with the Option to authenticating with a domain user/password  the send fail with “535 5.7.3 Authentication unsuccessful or 250 – AUTH NTM”

The Solution :

USE TLS connection or  uncheck – offer Basic…..Tls

image

 

SHMUEL H.

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