title: Will using Set-HostedContentFilterPolicy in PS for a 365 online anti-spam policy add an entry or overwrite the list?
body: <p>So we have over 500 blocked emails in our company anti-spam filter. I'm currently trying to learn how to make a PowerShell script to add emails to that spam filter, and right now, the best I've been able to discover is using the <code>Set-HostedContentFilterPolicy -Identity EMAIL@EMAIL.COM</code> command. Is this correct? I'd hate to use this command to find that it overwrites the entire list we have built up just to add the one. Thanks so much for looking at this!</p>