Hi, Seijisensei. Most or all of what you say might be true. However, that doesn't negate the steps I provided the user. The steps I gave him has to be done (or should be done anyway). They might work. But if there is a chance his mail fails, it would leave him with still simple steps to follow. Most likely the last one would be for him to put in a ticket indicating the resolve for his purchased (rented) IP. Most likely his ISP would provide this for him if it were presented clear enough.
Looking at the user's previous post, his request to his ISP might have had an element of vague which caused them to give him a blanket response that he's not paying for IT services and setup... just the working components of his package. It might have appeared that he was asking them to setup an mail server for him and resolve all the technical components.
The mail from my server worked when I used IP addresses and CNAMES, as what I suggested for this user. There was a time when my mail server resolved to the name of my upstream (216-153-132-69-choiceone.com). I used a canonical name for years (outgoing.apollo3.com IN CNAME [name given by upstream]). I eventually sent in a ticket requesting the IP be resolved to the hostname I provided in the ticket.
If he setup his DNS server and has this one element left and it fails, it would be simple for him to proceed with the same.
Since I have a number of domains I work with, I'm going to setup a test mail server and see if it'll work with the CNAME.
I would like to remind you that I gave the user steps to follow. Again, each of the steps I gave him are important. He made it clear that he was having problems understanding the full scope. So he can consider performing the steps I gave him, which is first to setup his DNS server... making it visible to the internet. Use the CNAME for his smtp server. Complete that step and let us know if he continues to have problems.
Again, if the CNAME entry fails, I'm certain his ISP would prefer to make a simple entry in his DNS server rather than loose the client (unless of course he really doesn't have the dedicated IP, but it's shared with other customers).
He can check if he really has the dedicate IP by creating a web page and attempting to access that page by the IP itself.
I understand that many of you have your own systematic approach for resolving issues and setting up services. But I believe the method I describe is also viable.
-- L. James
--
L. D. James
ljames@apollo3.com
www.apollo3.com/~ljames
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