From: Rene van Hoek (reneactive8.nl)
Date: Mon Jan 01 2007 - 07:20:46 CST

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Tom Kovar wrote:
>
> -----Original Message-----
> From: owner-postfix-userspostfix.org
> [mailto:owner-postfix-userspostfix.org] On Behalf Of Magnus Bäck
> Sent: Monday, January 01, 2007 1:42 PM
> To: postfix-userspostfix.org
> Subject: Re: SASL vs. M$ Outlook and Outlook Express
>
>
> On Monday, January 01, 2007 at 13:34 CET,
> Tom Kovar <postfix_listkovarovi.org> wrote:
>
>> I have been using successfully Postfix since good one year, and now I
>> have extended it with SASL, using dovecot, with MySQL in the
> background
>> for all authentications. Everything seems to be working fine, when I
>> send the SMTP commands manually, authentication is successfull and
>> sending e-mail works according to the rules.
>> Not so from Micro$oft clients, where I always get "Relay access
> denied".
>> Inspecting the Postfix-Syslog, after enabling debug, reveals the
> source
>> of the problem - even if I enabled the "SMTP server requires
>> authentification" check box in these clients, they still do not send
> the
>> SMTP AUTH message. The sequence of SMTP messages is
>> EHLO
>> MAIL FROM:
>> RCPT TO:
>> and this inevitably leads to the failure.
>>
>> Can anybody help me what the problem with M$ might be?
>
> Perhaps you're forgetting this:
> http://www.postfix.org/postconf.5.html#broken_sasl_auth_clients
>

> Would be too nice... No, I am not forgetting it - and also in the log
> file I see my server sending both 250 messages in reply to EHLO - the
> one with = and the one without...

Hi,

I am also using Postfix as mta and have a lot of users with Microsoft
Outlook / Outlook express. I require all my users to authenticate in
order to relay (with SASL). No problem so far.

Do you require TLS? Otherwise, in Outlook you must specify that the
password is send in clear-text. Check also this kind of settings.

Did you reboot your Windows PC's?. When one of our customers have an
'strange' problem (settings are ok, everything worked before) and the
customer is using Windows, we always advice to reboot. This solves the
problem in 9 of 10 cases.

Greetings,

rene at active8 nl

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