War Preparations wrote:
Can emails be sent within a network without using the internet?
Do you remember in the early days of the net using backslash bang syntax?
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
Just a thought.
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
Just a thought.
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
Just a thought.
On 3/4/2026 4:18 PM, War Preparations wrote:
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
Just a thought.
A mail server can operate on a local network (LAN) without internet by using internal SMTP/IMAP/POP3 services.
Email clients (Outlook, Thunderbird) need(required) to be configured to point to the local server's IP address for both incoming(POP/IMAP) and outgoing(SMTP).
Email server software is necessary.
ÿ- open source(free) may be available
when looking for opensource, ensure that the company and development is current. i.e. open source(especially free) may be available, but no longer developed, supported, or updated.
On Thu, 3/5/2026 3:32 AM, ...w¤?ñ?¤ wrote:
On 3/4/2026 4:18 PM, War Preparations wrote:
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
Just a thought.
A mail server can operate on a local network (LAN) without internet by using internal SMTP/IMAP/POP3 services.
Email clients (Outlook, Thunderbird) need(required) to be configured to point to the local server's IP address for both incoming(POP/IMAP) and outgoing(SMTP).
Email server software is necessary.
ÿ- open source(free) may be available
when looking for opensource, ensure that the company and development is current. i.e. open source(especially free) may be available, but no longer developed, supported, or updated.
I use hmailserver in a VM, to test email clients.
The hardest part of that, is preparing a certificate for
it to use. The unencrypted options are really disabled
and not usable, leaving only encryption-in-flight and
the email clients expect a valid certificate for that.
And generally, you cannot get a quality certificate
for a mail.local domain . Clients can insist on valid
reverse DNS, and reverse DNS that does not involve
the HOSTS file too.
It's not trivial removing all the handcuffs on this stuff.
hmailserver is also no longer supported. It was supported
when I first installed it, but it has gone out of support
since.
Paul
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
Just a thought.
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
What makes you think armed forces use (public) email as their operational communication medium? lol.
Just a thought.
Maybe try asking chatgpt next time.
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only
want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders.
What makes you think armed forces use (public) email as their operational
communication medium? lol.
I worked for the military, and they did use email.
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?What makes you think armed forces use (public) email as their operational >>> communication medium? lol.
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only >>>> want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders. >>>
I worked for the military, and they did use email.
Operationally, in the field?
Didn't Hogseth use the signal app to direct a war attack action?
Why not facebook or any other social app?
On Fri, 6 Mar 2026 18:03:35 -0600, Hank Rogers <Hank@nospam.invalid>
wrote:
Didn't Hogseth use the signal app to direct a war attack action?
Why not facebook or any other social app?
Signal is a messaging app.
Facebook is not an app, but a website, though it has a messaging
function.
Steve Hayes <hayesstw@telkomsa.net> wrote:
On Fri, 6 Mar 2026 18:03:35 -0600, Hank Rogers <Hank@nospam.invalid>
wrote:
Didn't Hogseth use the signal app to direct a war attack action?
Why not facebook or any other social app?
Signal is a messaging app.
Facebook is not an app, but a website, though it has a messaging
function.
Facebook is of course a website ('webapp') *and* an app (at least for
iOS and Android and perhaps other platforms). And yes, both have a
messaging function.
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?What makes you think armed forces use (public) email as their operational >>> communication medium? lol.
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only >>>> want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders. >>>
I worked for the military, and they did use email.
Operationally, in the field?
On 6/03/2026 8:39 am, Carlos E.R. wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?What makes you think armed forces use (public) email as their
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only >>>> want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders. >>>
operational
communication medium? lol.
I worked for the military, and they did use email.
You must be a "newbie", then, Carlos. When I was in the Australian Army (1973 - 93), sure, we could send Signals and, in a System Control
situation, we had direct tty comms to 'the other end' .... well, as long
as they weren't communicating with someone else at that time (the one TTY-writer was switched between three or four circuits).
But e-mails hadn't 'occurred' yet, at least in the Aust Army.
On 10/03/2026 7:23 am, Carlos E.R. wrote:
On 2026-03-09 10:36, Daniel70 wrote:
On 6/03/2026 8:39 am, Carlos E.R. wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to >>>>>> prevent hackers from spying. If you have your own
mail server and only want to communicate with 255 people,
would this be possible? Armies around the world would need a
way to communicate with their commanders.
What makes you think armed forces use (public) email as their
operational communication medium? lol.
I worked for the military, and they did use email.
You must be a "newbie", then, Carlos. When I was in the Australian
Army (1973 - 93), sure, we could send Signals and, in a System
Control situation, we had direct tty comms to 'the other end' ....
well, as long as they weren't communicating with someone else at that
time (the one TTY-writer was switched between three or four circuits).
But e-mails hadn't 'occurred' yet, at least in the Aust Army.
I worked for the military, but as a civilian. I don't know what the
people with guns use in the field,
Mainly Voice Radio, section to section. "Larger" Bases, Squadrons, Companies, etc, would have had some sort of TTY that would have been encrypted prior to being applied to a Radio signal, maybe multi-channel
TTY to the one Voice Channel.
I saw what they used in their offices, in peacetime. For things like
spares requirement and stock maintenance. I did not have access to
email or anything, just saw that some had it. My station had very old
software.
Software?? Old or otherwise beat what I had, Carlos!! ;-P
Obviously if they have to buy, say, bolts, from a civilian provider,
they have to use email.
.... or got for a walk/ride down the street!
On 10/03/2026 11:23 pm, Carlos E.R. wrote:
On 2026-03-10 09:48, Daniel70 wrote:
On 10/03/2026 7:23 am, Carlos E.R. wrote:
<Snip>
system (did they have 13 numeral Stock Numbers (DSN [Defence StockObviously if they have to buy, say, bolts, from a civilian provider,
they have to use email.
.... or got for a walk/ride down the street!
Huh, no way. Had to be via procurement office. All the paperwork and
blue tape. :-D
Yeap, the vast majority of Spare Parts were via the Army's Q-Store
Number] or NSN [NATO Stock Number])??) .... with the wait that that involved.
But, on occasion, we needed parts that were yet to make it into the Q-
Store system. Or we needed it *NOW* not in six weeks/months time!
On 2026-03-10 09:48, Daniel70 wrote:
On 10/03/2026 7:23 am, Carlos E.R. wrote:
On 2026-03-09 10:36, Daniel70 wrote:
On 6/03/2026 8:39 am, Carlos E.R. wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?
For example, governments might block the internet during a war to >>>>>>> prevent hackers from spying. If you have your own
mail server and only want to communicate with 255 people,
would this be possible? Armies around the world would need a
way to communicate with their commanders.
What makes you think armed forces use (public) email as their
operational communication medium? lol.
I worked for the military, and they did use email.
You must be a "newbie", then, Carlos. When I was in the Australian
Army (1973 - 93), sure, we could send Signals and, in a System
Control situation, we had direct tty comms to 'the other end' ....
well, as long as they weren't communicating with someone else at that >>>> time (the one TTY-writer was switched between three or four circuits). >>>>
But e-mails hadn't 'occurred' yet, at least in the Aust Army.
I worked for the military, but as a civilian. I don't know what the
people with guns use in the field,
Mainly Voice Radio, section to section. "Larger" Bases, Squadrons,
Companies, etc, would have had some sort of TTY that would have been
encrypted prior to being applied to a Radio signal, maybe multi-channel
TTY to the one Voice Channel.
I saw what they used in their offices, in peacetime. For things like
spares requirement and stock maintenance. I did not have access to
email or anything, just saw that some had it. My station had very old
software.
Software?? Old or otherwise beat what I had, Carlos!! ;-P
I think it was Windows 98 or NT, around 2010. I don't remember for certain.
Installed in a very secure way, the machine had to boot from the network (bios?boot from network) or it would not connect at all.
Obviously if they have to buy, say, bolts, from a civilian provider,
they have to use email.
.... or got for a walk/ride down the street!
Huh, no way. Had to be via procurement office. All the paperwork and
blue tape. :-D
On 2026-03-07 00:18, Chris wrote:
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet?What makes you think armed forces use (public) email as their operational >>>> communication medium? lol.
For example, governments might block the internet during a war to
prevent hackers from spying. If you have your own mail server and only >>>>> want to communicate with 255 people, would this be possible? Armies
around the world would need a way to communicate with their commanders. >>>>
I worked for the military, and they did use email.
Operationally, in the field?
I was not allowed there :-)))
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-10 09:48, Daniel70 wrote:
On 10/03/2026 7:23 am, Carlos E.R. wrote:
On 2026-03-09 10:36, Daniel70 wrote:
On 6/03/2026 8:39 am, Carlos E.R. wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet? >>>>>>>>
For example, governments might block the internet during a war to >>>>>>>> prevent hackers from spying. If you have your own
mail server and only want to communicate with 255 people,
would this be possible? Armies around the world would need a
way to communicate with their commanders.
What makes you think armed forces use (public) email as their
operational communication medium? lol.
I worked for the military, and they did use email.
You must be a "newbie", then, Carlos. When I was in the Australian
Army (1973 - 93), sure, we could send Signals and, in a System
Control situation, we had direct tty comms to 'the other end' ....
well, as long as they weren't communicating with someone else at that >>>>> time (the one TTY-writer was switched between three or four circuits). >>>>>
But e-mails hadn't 'occurred' yet, at least in the Aust Army.
I worked for the military, but as a civilian. I don't know what the
people with guns use in the field,
Mainly Voice Radio, section to section. "Larger" Bases, Squadrons,
Companies, etc, would have had some sort of TTY that would have been
encrypted prior to being applied to a Radio signal, maybe multi-channel
TTY to the one Voice Channel.
I saw what they used in their offices, in peacetime. For things like
spares requirement and stock maintenance. I did not have access to
email or anything, just saw that some had it. My station had very old
software.
Software?? Old or otherwise beat what I had, Carlos!! ;-P
I think it was Windows 98 or NT, around 2010. I don't remember for certain. >>
Installed in a very secure way, the machine had to boot from the network
(bios?boot from network) or it would not connect at all.
Obviously if they have to buy, say, bolts, from a civilian provider,
they have to use email.
.... or got for a walk/ride down the street!
Huh, no way. Had to be via procurement office. All the paperwork and
blue tape. :-D
"blue" tape is an interesting idiom. Is that a direct translation from Spanish? In English, overbearing bureaucracy is called *red* tape. I think it's because in the depths of time official/legal documents had red ribbons tied around them. High Court documents still do.
On 2026-03-11 13:01, Chris wrote:
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-10 09:48, Daniel70 wrote:
On 10/03/2026 7:23 am, Carlos E.R. wrote:
On 2026-03-09 10:36, Daniel70 wrote:
On 6/03/2026 8:39 am, Carlos E.R. wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet? >>>>>>>>>
For example, governments might block the internet during a war to >>>>>>>>> prevent hackers from spying. If you have your own
mail server and only want to communicate with 255 people,
would this be possible? Armies around the world would need a >>>>>>>>> way to communicate with their commanders.
What makes you think armed forces use (public) email as their
operational communication medium? lol.
I worked for the military, and they did use email.
You must be a "newbie", then, Carlos. When I was in the Australian >>>>>> Army (1973 - 93), sure, we could send Signals and, in a System
Control situation, we had direct tty comms to 'the other end' .... >>>>>> well, as long as they weren't communicating with someone else at that >>>>>> time (the one TTY-writer was switched between three or four circuits). >>>>>>
But e-mails hadn't 'occurred' yet, at least in the Aust Army.
I worked for the military, but as a civilian. I don't know what the
people with guns use in the field,
Mainly Voice Radio, section to section. "Larger" Bases, Squadrons,
Companies, etc, would have had some sort of TTY that would have been
encrypted prior to being applied to a Radio signal, maybe multi-channel >>>> TTY to the one Voice Channel.
I saw what they used in their offices, in peacetime. For things like >>>>> spares requirement and stock maintenance. I did not have access to
email or anything, just saw that some had it. My station had very old >>>>> software.
Software?? Old or otherwise beat what I had, Carlos!! ;-P
I think it was Windows 98 or NT, around 2010. I don't remember for certain. >>>
Installed in a very secure way, the machine had to boot from the network >>> (bios?boot from network) or it would not connect at all.
Obviously if they have to buy, say, bolts, from a civilian provider, >>>>> they have to use email.
.... or got for a walk/ride down the street!
Huh, no way. Had to be via procurement office. All the paperwork and
blue tape. :-D
"blue" tape is an interesting idiom. Is that a direct translation from
Spanish? In English, overbearing bureaucracy is called *red* tape. I think >> it's because in the depths of time official/legal documents had red ribbons >> tied around them. High Court documents still do.
Oh, no, mind goof. It is red tape. Maybe because I have some folders
that are actually tied with blue ribbons.
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-11 13:01, Chris wrote:
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2026-03-10 09:48, Daniel70 wrote:
On 10/03/2026 7:23 am, Carlos E.R. wrote:
On 2026-03-09 10:36, Daniel70 wrote:
On 6/03/2026 8:39 am, Carlos E.R. wrote:
On 2026-03-05 21:39, Chris wrote:
War Preparations <Kier@invalid.invalid> wrote:
Can emails be sent within a network without using the internet? >>>>>>>>>>
For example, governments might block the internet during a war to >>>>>>>>>> prevent hackers from spying. If you have your own
mail server and only want to communicate with 255 people,
would this be possible? Armies around the world would need a >>>>>>>>>> way to communicate with their commanders.
What makes you think armed forces use (public) email as their >>>>>>>>> operational communication medium? lol.
I worked for the military, and they did use email.
You must be a "newbie", then, Carlos. When I was in the Australian >>>>>>> Army (1973 - 93), sure, we could send Signals and, in a System
Control situation, we had direct tty comms to 'the other end' .... >>>>>>> well, as long as they weren't communicating with someone else at that >>>>>>> time (the one TTY-writer was switched between three or four circuits). >>>>>>>
But e-mails hadn't 'occurred' yet, at least in the Aust Army.
I worked for the military, but as a civilian. I don't know what the >>>>>> people with guns use in the field,
Mainly Voice Radio, section to section. "Larger" Bases, Squadrons,
Companies, etc, would have had some sort of TTY that would have been >>>>> encrypted prior to being applied to a Radio signal, maybe multi-channel >>>>> TTY to the one Voice Channel.
I saw what they used in their offices, in peacetime. For things like >>>>>> spares requirement and stock maintenance. I did not have access to >>>>>> email or anything, just saw that some had it. My station had very old >>>>>> software.
Software?? Old or otherwise beat what I had, Carlos!! ;-P
I think it was Windows 98 or NT, around 2010. I don't remember for certain.
Installed in a very secure way, the machine had to boot from the network >>>> (bios?boot from network) or it would not connect at all.
Obviously if they have to buy, say, bolts, from a civilian provider, >>>>>> they have to use email.
.... or got for a walk/ride down the street!
Huh, no way. Had to be via procurement office. All the paperwork and
blue tape. :-D
"blue" tape is an interesting idiom. Is that a direct translation from
Spanish? In English, overbearing bureaucracy is called *red* tape. I think >>> it's because in the depths of time official/legal documents had red ribbons >>> tied around them. High Court documents still do.
Oh, no, mind goof. It is red tape. Maybe because I have some folders
that are actually tied with blue ribbons.
Ah, shame. Would have been a fun difference.
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