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Is Ping a reliable way to check if a server is available?
just recently thought an smtp server was down because I couldn't ping it. half hour later, sure enough I realize that while I can't ping it, I can still telnet to it on port 25.
What happens inbetween SMTP and POP3?
Thanks. Some questions: what "kind of" server is ISP-SERVER? SMTP? When POP3 is used to download the message, how did the message get into the mailbox initially? SMTP again? When you say "MAIL-SERVER has a mailbox for Dave", is the mailbox a part of SMTP, POP3, or something else? The DNS MX record seems like a key part of what I was missing. Again, many thanks.
Change default/installed user information
@Yehaw k I've added some info about particular registry keys