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List:       vchkpw
Subject:    Re: [vchkpw] rcpt check user problems with sender - resolution
From:       "tonix (Antonio Nati)" <tonix () interazioni ! it>
Date:       2006-06-01 11:39:41
Message-ID: 6.2.3.4.0.20060601133022.04de78f8 () pop ! ufficiopostale ! it
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At 00.07 01/06/2006, you wrote:
>tonix (Antonio Nati) wrote:
>>At 23.25 31/05/2006, you wrote:
>>
>>>tonix (Antonio Nati) wrote:
>>>
>>>>At 21.44 31/05/2006, you wrote:
>>>>
>>>>>Rick Macdougall wrote:
>>>>>
>>>>>>Ken Jones wrote:
>>>>>>
>>>>>>>Hi,
>>>>>>>
>>>>>>>Tonino was able to do a fast analysis of the problem.
>>>>>>>
>>>>>>>Server: Qmail with Tonino's check user patch.
>>>>>>>
>>>>>>>Problem:
>>>>>>>When an email sender identifying itself as SMTPSVC(6.0.3790.1830)
>>>>>>>sends an email to multiple rcpt's, where some of the rcpt are
>>>>>>>valid and some are invalid, not all the emails to valid rcpts
>>>>>>>are delivered and the sender reports an incorrect list of
>>>>>>>valid/invalid rcpts.
>>>>>>>
>>>>>>>Resolution:
>>>>>>>Problem due to Outlook not fully supporting SMTP protocol.
>>>>>>
>>>>>>
>>>>>>So there was no real resolution ?  Did you have them stop using 
>>>>>>the ISA firewall ?
>>>>>>Regards,
>>>>>>Rick
>>>>>
>>>>>
>>>>>
>>>>>I disabled check user for their static IP.
>>>>
>>>>
>>>>Are they using your server as a relay, or are they just sending 
>>>>to everyone from Outlook?
>>>>I feel chkuser should be disabled when used as relay from Outlook 
>>>>or Eudora.
>>>
>>>
>>>They are just sending using Outlook. Not as a relay.
>>>They are an external company sending to local users.
>>>
>>>We do not have any reported problems from any relay users.
>>
>>I have reported complaints from customers which use Outlook; when 
>>they send to multiple recipients (and one is wrong) cannot 
>>understand which is the error. So I have a dedicated qmail-smtpd 
>>for relaying users where I accept all messages without chkuser.
>
>It looks like firefox does not like the error message too.

To be more exact, this is not a problem of chkuser, but of every smtp 
server rejecting not existing rcpt (including qmail + chkuser).

>I sent a test mail to a valid and an invalid account on our mail
>server and firefox pops up a message:
>
>An error occurred while sending mail. The mail server responded:
>sorry, no mailbox here by that name (#5.1.1 - chkusr). Please verify
>that your email address is correct in your Mail preferences and try again.

Probably in a future version I'll give the option to have an extended 
error, specifying which rcpt has not been found.

Something like "sorry, <user@domain.com> is not known/recognized on 
this server (#chkuser)".

>Looks like I need to disable chkuser when RELAYCLIENT is set.
>
>Is there an easy way, with the current version, to disable chk user
>when the RELAYCLIENT is set?
>

Version 2.0.9 will have such feature. Probably I'll publish a 
2.0.9-beta that could help to solve these problems (actual code is 
stable, but I have to add other features, or more likely I'll freeze 
2.0.9 and work on 2.0.10).

Tonino

>Ken


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