Outgoing Port

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Posted on by Community Member

Hi friends,

I have a problem that really makes me in trouble.

I set server side synchronization for email in crm 2016. everything was good until ISP blocked 25 port. now when I use 465 SSL or 587 port for crm, I receive alert like this:

ActivityId: 8eaac4ad-a47a-4ca2-b814-55af4d99db4c
>Error : System.Net.Mail.SmtpException: Syntax error, command unrecognized. The server response was:
   at System.Net.Mail.SmtpConnection.ConnectAndHandshakeAsyncResult.End(IAsyncResult result)
   at System.Net.Mail.SmtpTransport.EndGetConnection(IAsyncResult result)
   at System.Net.Mail.SmtpClient.ConnectCallback(IAsyncResult result)

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