From: Mike Eller (meller1nc.rr.com)
Date: Tue Jan 22 2008 - 16:46:37 CST

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On Sun, 2008-01-20 at 21:08 +0100, mouss wrote:
> Mike Eller wrote:
> > Hello,
> >
> > I have installed postfix on a CentOS 5 server. All configs look good
> > and initial tests appear normal. However, based on the output of the
> > log, it seems my ISP is not allowing me to send/receive mail on my
> > server. The tutorial I used to configure the system stated this might
> > happen and that there are two possible work arounds. One was to use the
> > ISP's mail server and send my mail through that or there was something
> > that can be done with the ports. However, this tutorial did not go into
> > any detail about how to go about this process. So I am looking for a
> > way to use my mail server in spite of my ISP blocking the traffic. Can
> > anyone help me out with this or point me to a good resource?
> > Thank you,
> > Mike
> >
> >
>
> - for receiving, if they block incoming port 25, there's nothing you can
> do about it except using an external server and getting your mail from
> that server (getmail, fetchmail, ... etc).
>
>
> - for sending, you need to use your ISP relay. They may require
> authentication for this. you'll need to set
> relayhost = smtp:[smtp.isp.example]
> and configure SASL AUTH (client part) as documented in the SASL README
> (look at the client part). Among other things, you'll have to specify
> smtp_sasl_password_maps... etc.
>
> They will certainly not block port 25 to _their_relay_, because their
> help desk employees will suicide after few days of phone calls.
>
> Note that they may throttle you. so if you send a lot of mail, you'll
> need to fins another relay and use another port (587 is the standard for
> mail submission).

OK,
I contacted my ISP and they do not do any blocking of port 25. So I
looked around and found that I did not have the port forwarding for port
25 enabled on the firewall. So now I can send an email from the email
server and it gets out to other domains. I can also send email from
other domain to a user on my domain and it is received on the server and
populates the correct Maildir file.
I then, following the tutorial I have, turned on Dovecot.
I tried to retrieve an email from another machine after configuring the
email program (evolution). And I get "connection refused by
<myserver>". I do not have any documentation on this part of the
process....in case no one has guessed it yet, I am new to postfix.
So where do I look for configuring the email client...or postfix to
allow the client application to connect to the postfix server?
v/r
Mike
>

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