A business is attempting to E-Mail us and we are not receiving their E-Mails. This is a new occurrence. The last E-Mail we received from this user was on 7/23. No emails are coming through now and he gets the:
Deferred: 403 4.7.0
TLS handshake failed.
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I researched and found this:
Right clicking PROPERTIES on the default SMTP Server then ACCESS - CERTIFICATE - I then removed the existing certificate which solved the problem.
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But I do not want to start removing things I am not 100% certain of just off of a wim. We are running Exchange 2007 on Server 2003 R2. Also using TrendMicro but he is not getting a reply back from trendmicro that states it was due to trend.