Microsoft SMTP Server

Hello,

In the past, I have been mostly using "MailEnable" mail server (free version) for sending Emails to our clients. I have been sending out many commercial emails using the MailEnable mail server and now I know how to properly set up the SMTP mail server.
I have also been using the Microsoft SMTP server by adding the SMTP server feature in the Windows Server 2012 which hosts my websites and referring/specifying the SMTP server address simply as LocalHost in my classic ASP script.
Here are my questions:
Is MS SMTP Server faster/more efficient (use less system resources) than MailEnable for sending out email messages?
Can I specify how many mail messages the MS SMTP server should process in given length of time?
Can I specify which IP address are allowed to connect to the MS SMTP server (in fact I don't want anyone else to connect to the SMTP server except me)
Is it possible to set up user accounts with User ID and Password for connecting to the MS SMTP server?
Where should I go to configure the SMTP server settings?

Thank you.
ZKM128Asked:
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
1.  SMTP is fast and efficient and is the basis for Exchange
2.  You might be able to find number of concurrent messages processed on TechNet, however, it can can 1000s of messages (using Win2K3, we used to receive over 100,000 messages which were also processed and cleansed by anti-virus and and anti-spam on the same server
3.  You can setup relay options where only selected IPs can relay mail from this server
4.  You can setup either domain or local user accounts which you could use for authentication puposes.  What you want to do is avoid anonymous/unauthenticated mail relay
5.  You use IIS Manager for configuring IIS

See links below:

http://blog.hyperfive.com/2013/07/how-to-setup-internal-smtp-service-for.html
http://www.tech-faq.com/understanding-and-managing-smtp-virtual-servers.html
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ZKM128Author Commented:
Thank you very much for your help.
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