Issue Using javamail based client to send emails using SMTP wth Exchange server 2007 setup with Frontend receive connector using "Externally Secured" auth option
Observation: When telnetting to such an exchange server or using javamail to connect to it, the server responds with the following verbs to the EHLO message sent byy the client.
250-AUTH
250-PIPELINING
250-XECHG50
250-X-ANONYMOUSTLS
250-X-EXPS NTLM
....among other verbs
Note that , however, since the 250-AUTH verb doesn't have any arguments the javamail client isn't able to proceed with authentication as it fails to narrow down on a suitable mechanism.
This should not happen. In exchange server 2016 the server setup with same option of "Externally Secured" doesn't have AUTH verb in the EHLO response at all and so the client rightly is able to proceed.
Is this a known issue with exchange server earlier versions 2007? is there a patch available , this looks like a bug.
thanks