C# SMTP virtual server doesn't send mail [closed]
- by ragaei
I have got the following Exception :
System.Reflection.TargetInvocationException:
Exception has been thrown by the target of an invocation. -
System.Runtime.InteropServices.COMException (0x8004020F):
The server rejected one or more recipient addresses. The server response was: 550 5.7.1 Unable to relay for ragaei.mahmoud@invensys.com
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