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Sorry, I am not clearly with your question. Are you mean processing files by creation time or evaluate inside time in a file? If you mean processing of files by file creation time, please refer to this blog. If it's another hypothesis, you could access your system variables. System::StartTime will be when the package started execution. If there is a significant amount of time between start of execution and the element that needs to evaluate the current time, you can look at the ContainerStartTime. For more information, please refer to this thread.
After the validation, you could send emails via Send Mail Task. For more information, please refer to Send Mail Task and Sending email from SQL Server Integration Services.
Best regards,
Carrin
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