Using Mail Component in IIS 6

Could anyone tell me does the email component that come with IIS 6 secure and reliable?

Currently I'm using MailEnable and it is preventing me using ASP Script to auto send emails to any external email addresses such as yahoo.com, hotmail.com and many others when I disable "Allow Local Address Sender" to prevent open relay issue.

Does SMTP in IIS 6 has the same problem?

Thanks.

 

 

 

 

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