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Subject: Re: outgoing mail
From: Ralf Hildebrandt (news-list.postfix.usersinnominate.de)
Date: Wed Jul 05 2000 - 02:07:31 CDT

On 4 Jul 2000 18:12:07 +0200, asier etxebeste <asierihardun.com> wrote:

>>>If the parameter relayhost have the IP value of the ISP, all function OK,
>>>but if not, only function sometimes.
>
>>Hey, I'd guess you have a DNS problem then :)
>
>we use the ISP DNS

Even that one can fail. Perhaps the connection doesn't get built up as fast
as the DNS query times out?

>Jul 4 12:58:01 mail postfix/smtp[3466]: connect to netscape.net[207.200.83.93]: Connection timed out (port 25)
>Jul 4 12:58:01 mail postfix/smtp[3466]: 6579846744: to=<asierenetscape.net>, relay=none, delay=789, status=deferred (connect to netscape.net[207.200.83.93]: Connection timed out)

"relay=none" indicates that you're trying to send the mail directly. If you
try to send out LARGE mails (1-4MB) via a dialup, the "Other side" may lose
patience and drop the connection. I experienced that myself. Use the
relayhost of your ISP.

Do this via:

relayhost = mail.your.isp

As a fallback, put the IP and hostname into /etc/hosts (which hopefully will
be used by Postfix) 

-- 
Ralf.Hildebrandtinnominate.de
Dipl.-Informatiker                                        innominate AG
System Engineer                                       networking people
fon: +49.30.308806-44 fax: -77  web: http://innominate.de  pgp: /pgp/rh