My company is using 365 for email. Recently, we have started seeing an uptick in spam/phishing emails. To combat this a colleague setup a mail flow rule in exchange admin to block emails from a list of email addresses.
When I open the rule, it tells me it contains 120 email addresses to block. I add a few more and the number never goes above 120. Is there a limit to the number of email addresses I can block with a single rule? Should I create additional rules? I'm afraid that addresses are dropping off the list as I add new ones.
