> On 01/14/2013 02:04 AM, tovis wrote:
>>> On 01/11/2013 04:36 PM, tovis wrote:
>>>> I'm using exim4 configured with "smart host" on Debian Squeeze.
>>>> Also I have fetchmail, courier IMAP and apache2, php5, squirrelmail
>>>> combo
>>>> for mailing (I have several two booting boxes with win and linux - it
>>>> was
>>>> the easiest way to have mailing infrastructure for both systems). For
>>>> long
>>>> time I have no pőropblems, but now I have got several error messages
>>>> from
>>>> my "smart host":
>>>> Header (as it shown in Squirrelmail):
>>>> Return-path: <>
>>>> Envelope-to: postmaster@???
>>>> Delivery-date: Wed, 09 Jan 2013 10:30:40 +0100
>>>> Received: from Debian-exim by samu.bubu.dyndns.ws with local (Exim
>>>> 4.63)
>>>> id 1Tsrzc-0001Lv-DR
>>>> for postmaster@???; Wed, 09 Jan 2013 10:30:40
>>>> +0100
>>>> Auto-Submitted: auto-replied
>>>> From: Mail Delivery System <Mailer-Daemon@???>
>>>> To: postmaster@???
>>>> Subject: Message frozen
>>>> Message-Id: <E1Tsrzc-0001Lv-DR@???>
>>>> Date: Wed, 09 Jan 2013 10:30:40 +0100
>>>>
>>>> Message (as it shown in Squirrelmail):
>>>> Message 1Tsrzb-0001Ls-U7 has been frozen (delivery error message).
>>>> The sender is <>.
>>>>
>>>> The following address(es) have yet to be delivered:
>>>> some.one@???: SMTP error from remote mail server after MAIL
>>>> FROM:<>
>>>> SIZE=2673: host smtp.upcmail.hu [213.46.255.2]: 550 5.1.0 <> sender
>>>> rejected
>>>>
>>>> I think these emails are reading confirmation.
>>>> I think, that problem is "Return path" and "sender" fields are empty.
>>>> It could be solved by exim4 configuration? It could be the problem of
>>>> exim4? I'm not sure :(
>>>> Any help?
>>>
>>> Is smtp.upcmail.hu you, or under your control? Is it your smart-host?
>>> It looks like it's trying to deliver an empty-sender mail to
>>> "bigfirm.hu".
>>>
>>> What's the relationship with your "dyndns.ws" address; why did it send
>>> this
>>> notification there?
>>>
>>> Can you find out why the empty-sender mail was produced? They're
>>> legitimate for
>>> Delivery Status Notifications (DSNs), of which one class is a "bounce"
>>> (that is, a notification
>>> of failure to deliver).
>>> Have a look at your logs.
>>>
>>> It could just be that "bigfirm" are clueless, in rejecting all DSNs.
>>>
>>> It could, at the same time, be that some spammer faked a "bigfirm"
>>> sender
>>> address, and you accepted the spam and only later decided you couldn't
>>> deliver it, so you generated a bounce. This is legal per the mail
>>> protocol
>>> standards, but suboptimal in a spam-filled world. If so you need to
>>> work
>>> harder at spotting and rejecting spam during the SMTP conversation.
>>>
>>> --
>>> Cheers,
>>> Jeremy
>>>
>>>
>> Thanks for answer Jeremy!
>> smtp.upcmail.hu is my smart host (UCP is my internet provider to).
>> I only suspect, that those are "reading confirmation". When sender is
>> asking for it, yout open the mail, and send a confirmation - this is
>> clalled Delivery Status Notifications (DSNs)?
>
> It's plausible that "reading confirmations" are implemented as DSNs.
>
>> You right, it is only a suspect, because some of my contacts said that
>> they would not got confirmation from me. But for years our email
>> addresses
>> where used for spam - I've got several times offer for job from myself
>> :)
>> I do not know where emails with empty sender are created. I'm use
>> squirrelmail as MUA and exim4 as MTA. I do not see how does it work, and
>> where sender is became empty (even I do not understand why exim4 is
>> transferring these emails, I thought it is restricted by default).
>> The first question, could exim4 deliver such an email?
>
> Yes, unless specifically configured to not do so.
>
> Look at the logs.
>
> --
> Jeremy
>
>
"It's plausible that "reading confirmations" are implemented as DSNs."
That means smart host should accept those emails, is not it?
exim4 does not responsible what field (tag) is not filled, not exim4 would
not fix errors?
Unfortunately errors are gone for a week - I can not check them in logs :(
May be it was some error at smart host, and they correct it.
Sincerely
tovis
