Most people think that emoticons are a necessity in everyday mail communication, whereas some purely treat them as a mean to undermine their professional credibility. And consequently, attempt to sustain their inbound mail communication in more formal style. Unfortunately, Exchange Server platform does not provide sufficient tools to filter out or replace unwanted strings of signs, and establishing new rules in mail flow does not really solve the issue. The only way through is to use a third party solution.
CodeTwo Exchange Rules Pro is a centrally managed tool that tackles email flow control on Exchange. Its main service is directly deployed on a server communication pipeline and requires only a few touches from an administrator to be configured and start working. This fully packed toolbox allows users to swiftly modify incoming and outgoing messages by simply setting up appropriate rules. Creating a rule to eliminate emoticons from your Exchange mail is a piece of cake. Just check this out: