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This page has been moved and merged into 550 5.7.1 Unable to Relay Mail From Exchange Server please go there for more information on Troubleshooting.


  1. Hi


    Spoke with my IT group and they informed me I have to change the SMTP port number for outgoing mail if I wish external emails. Changed the number and it worked. So I can now have external access and allow only ceratin projets to be viewed.


    Thanks for your help.


  2. The solution proposed here does not make any sense and is a big security issue. It's perfectly normal and recommended not to allow senders to impersonate emails from outside your domain.

    It seems that Atlassian Support Tools is trying to send email as coming from an address that is clearly not one inside the domains and that's why our SMTP server are rejecting it. I am wondering when this will be fixed accordingly.