Error Message: 550 5.7.1 Message rejected as spam by Content Filtering.

Open the Exchange Management Shell: # To check the Content Filter configuration, type in: Get-ContentFilterConfig # To set the Bypassed Senders (example): Set-ContentFilterConfig -BypassedSenders donotspamme@calazan.com, jdoe@abc.com # To set the Bypassed Sender Domains (example): Set-ContentFilterConfig -BypassedSenderDomains calazan.com, *.xyz.com Important Note: BypassedSenders and BypassedSenderDomains are multivalued properties. When you use the Set-ContentFilterConfig cmdlet, it will overwrite the values of those properties. If you just need to add more senders or domains, please follow the example below. # To add Bypassed Senders: $x = Get-ContentFilterConfig $x.BypassedSenders += “jsmith@google.com”, “bhope@yahoo.com” # To remove Bypassed Senders (can only be done one at a time): $x = Get-ContentFilterConfig $x.BypassedSenders -= “jsmith@google.com” # To empty the list: Set-ContentFilterConfig -BypassedSenders $null