Outgoing e-mail not functioning - relaying

Outgoing e-mail not functioning - relaying

Hey guys,

I'm connecting SDP ondemand to an internal mailbox on our Exchange 2010 on premises, which works great. Mails coming in perfectly. 

I do not succeed however in sending answer back from SDP Ondemand to EXTERNAL users 

  • It DOES works if i send to our internal @tyu.be adresses
  • It DOESN'T work if i send to external (@microsoft.com, @dell.be, @zohocorp.com, etc...) 
Any suggestions on how i can handle this? Or does ME does have it's own mail relay server?

With regards,

Sven

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