The requested operation cannot be performed in multi-thread mode.
MailBee.NET (in MailBee.NET.dll) Version: 11.2.0 build 590 for .NET 4.5
public const int IllegalInMultiThreadMode
Public Const IllegalInMultiThreadMode As Integer
For instance, GetServerResponse
call is ambiguous in multi-thread
mode, since it's not possible to determine for which SMTP connection the last response must be
returned if there are multiple SMTP connections being opened. If you encounter this error,
component events to keep track of SMTP sessions.