At 21:59 28/05/00 , you wrote:
>You need to explain what you are doing a bit more clearly. I can't figure
>out what "i telnet to my isp port 25" means, especially since it seems to be
>something you want to do "before i can activate my sendmail". And what does
>"Using the IP and name of my isp" mean, and how does it differ from "i
>telnet to my isp port 25"?
3 months ago, when i used pine to send mail, the mail returned to me as root.
so, i checked my dns. i can get dns database of my isp and can ping/dig to
any of the ip/name in the database. so, i think my dns is ok.
next, i checked my sendmail. i kill and restart my sendmail. it's ok.
then, i doubted if my sendmail can reach to outside address.
to check that, i do :
telnet name_of_myisp 25 ( result : connection refused . . . )
telnet ip_of_myisp 25 ( result : connection refused . . . )
at this stage, i don't know what to do next.
>If you run sendmail (either directly or through inetd), it will listen for
>incoming connections on whatever host it is running on. So if, for example,
>your machine is IP address 12.34.56.78, doing a "telnet 12.34.56.78 25"
>should return the sendmail banner.
it is. i already did that. but, not to any address outside my LAN.
>If you are not yet running sendmail on the host, you will (correctly) get
>this message: "telnet: Unable to connect to remote host: Connection
>refused". This means simply that sendmail (or an equivalent MTA) isn't
>running yet on the host.
no, my sendmail is already activated. but, telnet to the remote host
refused connection.
>If you are trying to connect to port 25 on some other host (I'm still
>stumped about what "my isp port 25" is), it will answer if it is running
>sendmail, refuse if it is not. (Actually it is a bit more complicated, as
>firewalling rules come into play too ... but let's not get too complicated
>yet.) Whether that other host is running sendmail has nothing to do with
>your ability to run sendmail on your host.
so, how do i check if my sendmail is capable of connecting to some
outside/remote host.
>It is also possible that you are trying to do this through a
>firewall/router. That adds additional difficulties, and I won't even begin
>trying to explain them until I know more about your actual setup (but you
>can read the Firewall HowTo at www.linuxdoc.org to get an idea).
on my side, i don't adopt firewall yet. my linux is connected to LAN in my
office ( not as domain server ) and can connect with dial up to my isp.
>So ... try again. Explain in more detail what you are doing, quoting exact
>commands, exact responses, and explaining what hosts are involved.
i connect to my isp using kppp.
from ifconfig, i know the p-to-p address of my isp.
i can ping there, but can't telnet ( to its port 25 ). as i said :
"connection refused".
from using Eudora in windoze, i know the name and ip address of the smtp
server of my isp.
i tried to telnet . . . 25 to all of these, but "connection refused". all
those i did while my sendmail is already killed and restarted.
many thanks for your kind advices,
frans t.
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