Hi, so in short, a external contact to one of my internal employees is trying to send an email to us via their email relay server which is: "server.lanworx.com.sg". This appear to have been blacklisted on a content/keyword basis (the server isnt blacklisted, just the text string on a content level). So any email sent with that string in it in the subject, body or header is blocked by our EOP.
So I'm trying to whitelist this in EOP as submitting false positives generally takes to long.
Questions:
1. How long after I make a change, such as creating a new Mail Flow rulesuntil I can test this new rule? (does it take effect immediately or do I need to wait a while before testing it?)
2. If I send an email from a test Outlook.com account with the body of "server.lanworx.com.sg" this is blocked, even though I have a mail flow rule that says:
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server.lanworx.com.sgSet the spam confidence level (SCL) to '-1'
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Why would this rule not allow the email through?