Re: [exim] receiving mail on exim behind a :25 port firewall…

On 11/29/2010 12:43 AM, Heiko Schlittermann wrote:
> Hello Dani,
> dani<dani@???> (Fr 26 Nov 2010 17:15:20 CET):
>> hello,
>> i would like to ask the community if there is anything i can do in the
>> following situation:
>>
>> 1. linux server at home, behind a small router connected via a pppoe
>> firewalled connection with dynamic allocated ip address (i can send
>> emails fine behind the router, but i cant receive, my :25 port is
>> firewalled by isp, that cannot change unfortunately.)
>>
>> 2. linux server hosted on a public static ip, full access on the
>> machine, exim configured and running there.
>>
>> is there any way i can set up the two exims to be able ro receive mail
>> at home, on the firewalled linux ? i have full access on my domain dns
>> records aswell..
>
> If you set your external linux box as your primary (and probably only)
> MX, you have a lot of possibilities to forward the mail from there to
> your home box.

well, in process of learning exim , i would like to setup the lets call
it "public exim server" as a hub or somekind for emails of my domain,
that i would like it finally hosted on the "private exim server".

>
> If you'd like to forward it as SMTP, you should consider some type of VPN
> between the external and the home box, since all the dyndns games are
> fragile and you might end up forwarding your mails to some other than
> your home box.
>

uhm, i thought about setting a vpn from home to the public server and
maybe making my home exim listening to the ppp interface with the public
allocated IP but this would be an easier solution and i'm eager to learn
something more.

if i remember in the "old times" when some servers weren't connected 24h
there was something with uucp that handled mail in and out to these
"dialup machines"...

i'm not saying i am not keeping my home box always online, but there are
some outages sometimes (like i plan to sleep well and dont support the
fan noise so well :P )

thanks for the ideas but if you have some more pointers on my desired
setup with the "mail hubbing" from the public server to the home one i
would appreciate them, even if they're just urls where i can read about
it on the web.

>
> You do not find any detailed configuration in this mail - I do not know
> anything about your level of experience :-). Please ask if you need more
> information.
>
>
> Note: sooner or later you will experience problems in sending your mail
> to the outside world, since dynamic IP addresses tend to appear on
> blacklist (just because they are dynamic).
>
>