Jan Smitka a écrit :
> Hello, everyone,
> our company has recently bought a new server and we've switched from an
> old Fedora to Gentoo. We are now using the latest stable version of
> postfix (2.6.5) with fully virtual users (MySQL) and dovecot LDA.
> Everything worked fine when we were testing the configuration in an
> small LAN. However, after we put the server into the production
> environment yesterday, there is a problem with outgoing e-mails.
>
> When I try to send an e-mail from Thunderbird 3.0 on my machine (Win 7,
> x64), it fails with this error message:
> The mail server sent an incorrect greeting: .
> And in the server's maillog, there are some errors:
>
> Dec 20 09:14:54 server postfix/smtpd[20034]: lost connection after EHLO
> from 58.16.broadband2.iol.cz[83.208.16.58]
> Dec 20 09:14:54 server postfix/smtpd[20034]: disconnect from
> 58.16.broadband2.iol.cz[83.208.16.58]
>
> Same problem with Windows Live mail, except it's says only "Unknown
> error". I haven't tested any other clients yet and I don't know if I'm
> the only one who has problems - we changed the server yesterday and our
> clients don't send any e-mails on weekends.
>
> I've put my IP address into debug_peer_list and here's the full log:
> http://jan.smitka.org/server/maillog
>
> When I establish and SSH tunnel to another machine, forward my
> localhost's port 25 to server's port 25, change my outgoing SMTP server
> to localhost:25 and try to send an e-mail, everything works fine.
Test using telnet from your client machine and show the results.
$ telnet yourserver 25
EHLO smitka
MAIL FROM:<somesen...@example.org>
RCPT TO:<somerecipi...@example.com>
DATA
Subject: test new mail server
blah blah
.
QUIT
> It
> looks like it's a problem with EHLO message,
no, it's not an "EHLO" problem. the problem happens later.
make sure
- the client is not configured to use SSL or STARTTLS, because you did
not configure these, and
- the client is not configured to use an authentication meachnism that
is not enabled/advertized. if you use outlook, better set
"broken_sasl_auth_clients = yes".
other possibilities include a PIX/router/proxy/firewall that doesn't
like ESMTP.
A good resource for troubelshooting (and also for asking for help) is
http://www.postfix.org/DEBUG_README.html
> because when I send the
> mail directly, my client uses EHLO smitka (my workstation's name), but
> throught the tunnel it uses EHLO localhost. It's strange, because I
> didn't specified any smtpd_helo_restrictions. Full output of postconf -d
> is here: http://jan.smitka.org/server/postconf
>
'postconf -d' is rather useless, unless we want to know how your OS
vendors compiles postfix.
send out of 'postconf -n' instead, and please send it inline instead of
posting it on a web site. it should not be that large to require a url..
> I've tried to google, but I didn't found any relevant information. Has
> anyone any idea where's the problem? Many thanks in advance!
>
>
> Best regards
>
