Mail Gurus Please Help

Tue Apr 5 17:10:57 UTC 2022

Dear Ben,

> On Apr 5, 2022, at 12:46 PM, Ben Butler <760.f563 at gmail.com> wrote:
> 
> The only thing to add to Doug's post is you need to differentiate between
> whether your email is delivered directly to you on port 25 using smtp and
> consequently reuires this port to be forwarded to you mail server's
> internal private ip, or whether your email is delivered to some other mail
> server on the internet to a catch all mailbox for any email adress for that
> domain, and you mail server then subsequently retrieves email via pop3 from
> the first mail server with the catch all.

My mail is port forwarded to the internal IP of the server, where resides my MailServe program that distributes the mail further into my Mac Mail inboxes. So I am receiving the emails on my server, there is not other address of a catch all in play here. 
> 
> So NO IP will make the needed change to the A record used in your MX
> record, if you are behind your router / firewall you would exoect you have
> already forwarded port 25, if you have moved your server so it is now
> behind a different firewall/router then port 25 wont be set to be forwarded
> to you mail server.

You just mean router port forwarding has to be redone because most likely you now have a different internal IP number as opposed to last location. Yes, it changed from .3 to .2 so I re-set all the port forwarding entries.. I have done that many times so I am used to that part of this. That is all you are referring to isn’t it?  You’re not saying something else are you?
> 
> For completness the other thing that could cause problems is if the isp
> broadband provider for whatever reason has decides to block abd filter port
> 25 to their broadband customers,

I have used the Apple Network Utility and it’s Port Scan feature.. when I check for my domain on port 25 it says OPEN
I believe that MEANS that my ISP has NOT BLOCKED port 25.. isn’t that correct? If they blocked it then it would say Blocked there in that Utility correct? Also, noteworthy, when I talked to Spectrum in FL once they said "ALL PORTS ARE OPEN" about their Internet service.. and I am again with Spectrum here in NC.. so I would assume it is the same.. all ports are open.. and indeed, the utility says 25 is open.. 

So I think this point you are making is taken care of don’t you agree?

> a particullarly dumb and pointless thing
> to do, but it is technically possible that this could be done, in which
> case email will never get delivered in the first place to the edge of your
> firewall as it would have been filtered out before that, but your isp would
> need to particularly dim to do this.
> 
> Ben
> 
> On Tue, 5 Apr 2022, 17:32 Doug Easterbrook via omnisdev-en, <
> omnisdev-en at lists.omnis-dev.com> wrote:
> 
>> using NO-IP — doesn’t mean you IP address won’t change.   in fact it will,
>> and likely often.  Especially if you move service providers or even move
>> houses (let alone states) with the same service provider.
>> 
>> 
>> the theory..    your IP address is doled out by a DHCP server on a router
>> in some subnet where you are residing.  if you end up behind a different
>> router or DHCP server, you get a NEW IP address because I’ve rarely seen
>> routers that will determine you moved miles away and give you the same IP.
>> 
>> I’ve only seen it once for cisco routers for an entire university where
>> your IP followed you — but for home use.   I don’t ink ISP’s have any care
>> to be that nice.   so they don’t.   thats why you pay for fixed IP
>> addtesses.
>> 
>> 
>> 
>> all NO-IP does is change some DNS forwarding to point to your latest IP
>> address automatically — when you have a dynamic IP address.
>> 
>> 
>> and for you mail server, you generally need to have a reverse pointer to
>> your current IP address for email to be acceptable by other mail servers.
>> 
>> 
>> so, each time your ip address changes, you have to change your email
>> setup.
>> 
>> 
>> 
>> 
>> Doug Easterbrook
>> Arts Management Systems Ltd.
>> mailto:doug at artsman.com
>> http://www.artsman.com
>> Phone (403) 650-1978
>> 
>>> On April 5, 2022, at 8:48 AM, Das Goravani <goravanis at gmail.com> wrote:
>>> 
>>> 
>>> My mail stopped working when I moved from one state to another in the US.
>>> 
>>> Naturally I would suspect Port 25 to be closed with the new ISP
>> connection, but it is OPEN.
>>> 
>>> I used the Mac’s Network Utility with “Port Scan” to test 25 and it says
>> OPEN.
>>> 
>>> I had Spectrum ISP in FL and have it now again in NC.. they say they
>> leave all ports open also.
>>> 
>>> I have the same everything, including same router, same server, same
>> NO-IP connection.
>>> 
>>> I then checked my port forwarding settings and they are correct.
>>> 
>>> My MailServe program has all it’s little green lights on for the ports
>> also.
>>> 
>>> Mail was working at my last address just days ago.
>>> 
>>> I moved, re-setup things, and it stopped working. Everything is the
>> same, it should work.
>>> 
>>> I use NO-IP for DNS..  I do not have a fixed IP
>>> 
>>> It is supposed to work flawlessly when you move.. that’s what it’s for.
>>> 
>>> HTTP and other things seem to be working fine, forwarding and working
>> after the move. The server serves my website and it is up and running fine,
>> it is Goravani.com.  It is FOR Goravani.com that I want to receive mail..
>> on that domain.
>>> 
>>> For example I want to receive mail for
>>> das at Goravani.com
>>> activations at Goravani.com
>>> 
>>> Can you think of anything that would do this?
>>> 
>>> I’m on Catalina and using MailServe for Catalina. (That’s the name of
>> the mail serving program)
>>> 
>>> Mac mini Server.
>>> 
>>> Thanks for any attention you can give me,
>>> 
>>> Das Goravani
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