If a client initiates the SMTP communication using an EHLO (Extended Hello) command instead of the HELO command some additional SMTP commands are often available. They are often referred to as Extended SMTP (ESMTP) commands or SMTP service extensions. Every server can have its own set of extended SMTP commands.
Basic validation
Data validation
Answer:
You use a for loop when you know how many times you want to run the loop
Explanation:
if you dont know, use a while loop
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If I am correct, it should be D. Hopefully I was helpful.
