My first foray into using ezmlm+qmail resulted in a few users getting up to
hundreds if copies of the email. Does this mean that they are probably
behind a PIX with this broken feature? Why wouldn't it happen with all of
their other email? Is it a qmail incompatibility?
-K
> From: dan kelley <[EMAIL PROTECTED]>
> Date: Mon, 19 Mar 2001 16:34:47 -0500
> To: "Kep Brown" <[EMAIL PROTECTED]>
> Cc: [EMAIL PROTECTED]
> Subject: RE: Repeated Identical Messages
>
>
> as someone here was nice enough to point out to me:
>
> by default, certain versions of PIX software come out of the box with
> fixup protocol smtp 25
> enabled.
>
> this implements something called 'Mail Guard', which rewrites smtp
> conversations, only allowing rfc 821 commands.
>
> we've been having two types of mail problems since installing the pix:
>
> 1. certain domains just couldn't email us.
> 2. we sometimes receive hundreds of copies of the same email.
>
> once i removed the smtp fixup from the pix, mail started soming throough
> from the domains that fell into category #1. (incidentally, they we're all
> exchange servers). it appears that number2 is now fixed as well, although
> that will take more time to verify.
>
> basically, what would happen is this:
>
> remote mailserver initiates conversation, says something like
> EHLO server.imaginary.com
>
> the PIX would rewrite the line to this (becase EHLO isin't rfc821)
> XXXX server.imaginary.com
>
> to which qmail would respond:
>
> 502 unimplemented (#5.5.1)
>
> the upshot was that eventually i'd have about 50 qmail-smtpd processes
> running at any given time.
>
> what finally gave the source of the problem away:
>
> telnet <your mailserver> 25
> from both inside the network , and outside (through the pix).
>
> if you type help, and you get
> 502 unimplemented from the outside, and
> 214 qmail home page:http://pobox.com/~djb/qmail.html
> from the inside, the pix may be your problem.
>
> dan
>
>
> At 01:12 PM 3/19/01 -0800, you wrote:
>> What would a PIX have to do with it? I am having a random mutiple delivery
>> problem, and I am behind a PIX.
>>
>> Thanks
>> Kep
>>
>> _____
>>
>> ants.com <http://www.ants.com> scout <http://www.ants.com/scout>
>>
>> Kep Brown
>> Systems, Network and Database Administrator
>> phone: (805) 560-3781
>> fax: (805) 560-3991
>> e: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Moutsos Georgios [mailto:[EMAIL PROTECTED]]
>> Sent: Monday, March 19, 2001 10:21 AM
>> To: dan kelley
>> Cc: [EMAIL PROTECTED]
>> Subject: RE: Repeated Identical Messages
>>
>>
>> Your servers are probably behind a Cisco PIX firewall.
>>
>> J.
>>
>>> -----Original Message-----
>>> From: dan kelley [mailto:[EMAIL PROTECTED]]
>>> Sent: ÄåõôÝñá, 19 Ìáñôßïõ 2001 6:35 ìì
>>> To: Markus Stumpf
>>> Cc: [EMAIL PROTECTED]
>>> Subject: Re: Repeated Identical Messages
>>>
>>>
>>>
>>> this is getting much weirder. following the message below, i tested both
>>> my backup and primary to see if they implemented help for qmail.
>>>
>>> here's what happened:
>>>
>>> when i test help by doing the following:
>>>
>>> from an ip inside the local network:
>>>
>>>> telnet mailhost.otec.com smtp
>>> [dkelley@mx1 qmail]# telnet mailhost.otec.com smtp
>>> Trying 209.3.117.5...
>>> Connected to mx1.ny.otec.com.
>>> Escape character is '^]'.
>>> 220 mx1.ny.otec.com ESMTP
>>> help
>>> 214 qmail home page: http://pobox.com/~djb/qmail.html
>>>
>>> from a remote ip:
>>> % telnet mailhost.otec.com smtp
>>> Trying 209.3.117.5...
>>> Connected to mx1.ny.otec.com.
>>> Escape character is '^]'.
>>> 220 *********************
>>> help
>>> 502 unimplemented (#5.5.1)
>>>
>>> ...
>>
>>
>>
>>
>
> ________________
> Dan Kelley
> www.otec.com
> 212-840-8600
> ________________
>
