We are running a small company and using MS Exchange 2013 for email. now proble is that we can send and recieve emails internally in our company we can send email outside world also but we are not receiving mails from outside world. we need expert to fix this. atttached file is error sender receive when he sends email.
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16 year of experience on MS Exchange, Worked in Datacenter Environment, 60+ Exchange projects are implemented and managed along with Disaster Recovery of Exchange Services.