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From: Netizen X on 17 Mar 2010 10:15
What does the relay feature mean? I'm talking in terms of qmail
(configuring it from plesk).

Does it mean that other smtp servers will send it emails to pass on to
the correct server or something?

Do I need it enabled to recieve emails on my domain?

I'm asking because I always have 3 or 4 remote connections to my smtp
port in netstat. and that doesn't seem right to me.
From: habibielwa7id on 18 Mar 2010 05:26
On Mar 17, 4:15 pm, Netizen X <nze...(a)googlemail.com> wrote:
> What does the relay feature mean? I'm talking in terms of qmail
> (configuring it from plesk).
>
> Does it mean that other smtp servers will send it emails to pass on to
> the correct server or something?
>
> Do I need it enabled to recieve emails on my domain?
>
> I'm asking because I always have 3 or 4 remote connections to my smtp
> port in netstat. and that doesn't seem right to me.

-If you doubt your mail server behaviour check the logs to make sure
what is going on.
If you installed Qmail into it's default locations , You will find the
logs in /var/log/qmail/
-I advise you to do some search about relaying emails, Any way in
short relay means to send emails or to forward emails for you, This
happens in Qmail for example many ways, May you authenticated using a
password so the mail server accept emails from you and send it to it's
destinations. Or you permit open relay for some specific ip addresses
related to your organization, This way the server will accept emails
from you and forward it to it's destinations even if you didn't
authenticated to the mail server, In Qmail like when you mention in /
etc/tcp.smtp something like,
195.229.65.34:allow,RELAYCLIENT="",RBLSMTPD=""
This means Qmail will accept emails and forward it or relay it for you
if your ip is in this case 195.229.65.34. Because of the word
RELAYCLIENT="". And also will bypass RPLs checks when receiving
connections from this ip address by the magic word RBLSMTPD="".
Qmail is a pretty secure mail server, And anyway most of MTAs nowadays
will refuse to start as an open relay MTA, Because this is too bad, If
your MTA is an open relay, it will accept emails from anybody what
ever his ip is and after some time the ip and your mail server will be
recorded in many RPLs as spammers targeted MTA, And a lot of MTAs will
not accept emails from your MTA.
Regards,



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