Re: Trouble with email addresses containing empty domain labels

Zitat von Jens Wahnes <[email protected]>:

> Jens Wahnes wrote:
>> Jens Wahnes wrote:
>>> Jan Schneider wrote:
>>>
>>>> I was able to track this down to Horde_Idna. The error will be catched
>>>> in Horde_Idna 1.1.0 and displayed smarter in IMP 6.2.18.
>>>
>>> I looked into this again today. Even though I have got the new versions
>>> installed (both Horde_Idna 1.1.0 and IMP 6.2.18), I still seem to get
>>> the same error, i.e. no warning when sending an email to an address like
>>> [email protected] and the mail is actually being sent to "foo" without
>>> any domain. Are there any other dependencies that I may have missed?
>>
>> I can see this working on demo.horde.org, i.e. trying to send an  
>> email to "[email protected]" from demo.horde.org is aborted with an  
>> error message.  Still, this does not happen in our setup.  On our  
>> systems, the email is being sent to the "localpart only" address  
>> instead.  Is nobody else having this problem?
>>
>> Looking for things that are unique to our setup, I thought that  
>> this might be because we use a "pre_sent" hook to add headers to  
>> outgoing email messages, but even when disabling that hook, the  
>> problem persists.   I don't seem to be getting any hint from the  
>> log files neither.  So I'm running out of clues what part of our  
>> configuration might be causing the trouble.  Maybe someone has got  
>> an idea how to debug this further? Could it be caused by other  
>> hooks we've got?
>>
>> What strikes me though is the fact the error message I get on  
>> demo.horde.org when trying to send an email to "[email protected]"  
>> is "Invalid e-mail address ([email protected])."
>> According to the code that I see in .../imp/lib/Compose.php around  
>> line 1300, this would be the error message that is generated upon a  
>> Horde_Mail_Exception, not upon Horde_Idna_Exception, because in the  
>> latter case, the message would contain a colon.  I thought this  
>> whole problem was related to Horde_Idna?  To me, the code added in  
>> the commit  
>> <https://github.com/horde/horde/commit/36b0073ab1184a4b6f2a2beea3c286ce087c763d> suggests that catching Horde_Idna_Exception is supposed to fix the problem?  Or am I on the wrong track  
>> completely?
>
>
> I was revisiting this problem today as it persists in our environment, using
>
> Horde_Idna                   1.1.1   stable
> imp                          6.2.21  stable
>
> What I was able to find out is that whether or not the problem will  
> be caught by the fix mentioned above depends on the "maildomain"  
> setting for the mail server used (as set in Imp's  
> backends.local.php).  If "maildomain" is set to the empty string, as  
> is the case in the "advanced" configuration given as an example in  
> backends.php, an error message is displayed if one tries to send an  
> email to e.g. "[email protected]" with two adjacent dots in the  
> domain name. However, if the "maildomain" property of the mail  
> server is set to a proper hostname, e.g. "example.net", no warning  
> is displayed and the email is sent to e.g. "john.joe" without a  
> domain name.
>
> I tried to work around this using a hook, that is "public function  
> compose_addr(Horde_Mail_Rfc822_Address $addr)" as described in Imp's  
> hooks.php.dist.  The idea was to look for addresses that contain  
> ".." in the host part of the email address and reject them in the  
> hook. However, that did not work either.  When the backend's  
> "maildomain" property is set to e.g. "example.net" and one tries to  
> send an email to the misspelled "[email protected]" address  
> again, then inside the hook the $addr->mailbox variable will be set  
> to "john.doe", but the $addr->host variable will be "example.net"  
> (as given in the "maildomain" setting) and not "example..org" (as  
> given by the user writing the email message).  So one cannot catch  
> the wrong email address there.  Of course, the email is sent to just  
> "john.doe" (without domain name) eventually without the  
> "example.net" suffix applied.  (In the imp_sentmail table, this will  
> be recorded as "[email protected]"). If anyone else is going to  
> try this out, please note that changes made to backends.local.php  
> will only be applied to new sessions, so one has to re-login to  
> properly test those changes.
>
> Any chance for an easy fix to this?
>
>
> Thanks
> Jens

I still cannot reproduce this, even with the 'maildomain' setting  
popuplated. I get the same error message with and without that. And I  
always get the error message including the colon. I get that on  
demo.horde.org too though.

-- 
Jan Schneider
The Horde Project
https://www.horde.org/

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