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Jonas Meurer *nix forums beginner
Joined: 20 Feb 2005
Posts: 47
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Posted: Wed Jul 19, 2006 5:29 pm Post subject:
Questions about "Line too long"
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Hello,
i run exim 4.50-8sarge2 on a debian/sarge server.
some mails to t-online.de addresses are rejected with the following
message:
** somebody@t-online.de <somebody@t-online.de> R=dnslookup
T=remote_smtp: SMTP error from remote mailer after end
of data: host mailin06.sul.t-online.de [194.25.134.11]:
500 5.6.1 Line too long.
i found only one useful link about this error:
http://www.exim.org/pipermail/exim-users/Week-of-Mon-20010625/027361.html
is it the case here, that mailin06.sul.t-online.de rejects the mail
because it contains lines that exceed a specified limit?
if this is true, does exim support to automatically break long lines
before transmitting the message to mailin06.sul.t-online.de?
....
jonas
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Tony Finch *nix forums Guru
Joined: 22 Mar 2002
Posts: 1222
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Posted: Wed Jul 19, 2006 5:34 pm Post subject:
Re: Questions about "Line too long"
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On Wed, 19 Jul 2006, Jonas Meurer wrote:
| Quote: |
is it the case here, that mailin06.sul.t-online.de rejects the mail
because it contains lines that exceed a specified limit?
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Probably.
| Quote: | if this is true, does exim support to automatically break long lines
before transmitting the message to mailin06.sul.t-online.de?
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No, though you could use a transport filter. However I fear what that may
break. Much better to just send sensible email in the first place, as
Suresh suggested.
Tony.
--
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N\}{([^N]*)(.)(.)(.*)}{\$1\$3\$2\$1\$3\n\$2\$3\$4\$3\n\$3\$2\$4}}\
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Jonas Meurer *nix forums beginner
Joined: 20 Feb 2005
Posts: 47
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Posted: Wed Jul 19, 2006 6:11 pm Post subject:
Re: Questions about "Line too long"
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On 19/07/2006 Tony Finch wrote:
| Quote: | On Wed, 19 Jul 2006, Jonas Meurer wrote:
is it the case here, that mailin06.sul.t-online.de rejects the mail
because it contains lines that exceed a specified limit?
Probably.
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seems like a too long Subject may be one reason.
i tested long lines in the body and long subjects:
- body line with 20000 chars is no problem for mailin06.sul.t-online.de
- subject with 16373 chars is no problem for mailin06.sul.t-online.de
- subject with 16375 chars is rejected with "500 5.6.1 Line too long."
but i doubt that people send mail with subjects > 16373 characters. so
there may be other cases, where the t-online mailserver responds with
"500 5.6.1 Line too long.".
my tests also showed, that courier for example rejects any mails with
subjects longer than ca. 4990 lines.
| Quote: | if this is true, does exim support to automatically break long lines
before transmitting the message to mailin06.sul.t-online.de?
No, though you could use a transport filter. However I fear what that may
break. Much better to just send sensible email in the first place, as
Suresh suggested.
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the problem is that newsletters are sent through this server, and some
of them have more than 50 t-online addresses subscribed. and for some
reason the error happens quite often.
i will see whether i can get one of the mails that produced such an
error. but the error occurs only for t-online addresses, all others
receive the newsletter.
....
jonas
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Marc Sherman *nix forums Guru
Joined: 28 Jan 2005
Posts: 553
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Posted: Wed Jul 19, 2006 6:18 pm Post subject:
Re: Questions about "Line too long"
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Jonas Meurer wrote:
| Quote: |
the problem is that newsletters are sent through this server, and some
of them have more than 50 t-online addresses subscribed. and for some
reason the error happens quite often.
i will see whether i can get one of the mails that produced such an
error. but the error occurs only for t-online addresses, all others
receive the newsletter.
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Is it possible that t-online is adding a header containing all the RCPT
addresses on their server, and that's the line it's rejecting because
there are too many recipients? If so, then setting max_rcpt on your SMTP
transport might solve the problem.
http://exim.org/exim-html-4.62/doc/html/spec_html/ch30.html
- Marc
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Jonas Meurer *nix forums beginner
Joined: 20 Feb 2005
Posts: 47
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Posted: Wed Jul 19, 2006 6:42 pm Post subject:
Re: Questions about "Line too long"
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On 19/07/2006 Marc Sherman wrote:
| Quote: | Jonas Meurer wrote:
the problem is that newsletters are sent through this server, and some
of them have more than 50 t-online addresses subscribed. and for some
reason the error happens quite often.
i will see whether i can get one of the mails that produced such an
error. but the error occurs only for t-online addresses, all others
receive the newsletter.
Is it possible that t-online is adding a header containing all the RCPT
addresses on their server, and that's the line it's rejecting because
there are too many recipients? If so, then setting max_rcpt on your SMTP
transport might solve the problem.
http://exim.org/exim-html-4.62/doc/html/spec_html/ch30.html
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sounds interesting, but according to the spec, the default is already
100, and 100 email-addressed don't produce 16500 characters.
maybe the limit for header lines difffers, and for the subject it is ca.
16000 chars, while for the t-online RCPT header it is something like
3000 chars.
i don't see any oterh way than investigating this with further tests.
thanks for your help
....
jonas
--
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Steffen Heil *nix forums beginner
Joined: 07 Feb 2005
Posts: 46
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Posted: Thu Jul 20, 2006 8:34 am Post subject:
Re: Questions about "Line too long"
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Hi
| Quote: | sounds interesting, but according to the spec, the default is
already 100, and 100 email-addressed don't produce 16500 characters.
maybe the limit for header lines difffers, and for the
subject it is ca.
16000 chars, while for the t-online RCPT header it is
something like 3000 chars.
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AFAIK, no line may be longer then 1000 chars in SMTP....
| Quote: | i don't see any oterh way than investigating this with further tests.
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Try to get such a mail. Post it here.
Regards,
Steffen |
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Matthew Byng-Maddick *nix forums addict
Joined: 03 Feb 2005
Posts: 93
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Posted: Thu Jul 20, 2006 2:06 pm Post subject:
Re: Questions about "Line too long"
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On Thu, Jul 20, 2006 at 10:34:44AM +0200, Steffen Heil wrote:
[>Attribution lost:]
| Quote: | 16000 chars, while for the t-online RCPT header it is
something like 3000 chars.
AFAIK, no line may be longer then 1000 chars in SMTP....
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But headers may have whitespace folding...
Cheers
MBM
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(Please use this address to reply)
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Steffen Heil *nix forums beginner
Joined: 07 Feb 2005
Posts: 46
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Posted: Thu Jul 20, 2006 10:30 pm Post subject:
Re: Questions about "Line too long"
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Hi
| Quote: | AFAIK, no line may be longer then 1000 chars in SMTP....
But headers may have whitespace folding...
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I know, but the message was "500 5.6.1 Line too long", not "500 5.6.1
Subject too long" or "500 5.6.1 Header too long".
Regards,
Steffen |
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Jonas Meurer *nix forums beginner
Joined: 20 Feb 2005
Posts: 47
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Posted: Fri Jul 21, 2006 11:08 am Post subject:
Re: Questions about "Line too long"
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On 21/07/2006 Steffen Heil wrote:
| Quote: | Hi
AFAIK, no line may be longer then 1000 chars in SMTP....
But headers may have whitespace folding...
I know, but the message was "500 5.6.1 Line too long", not "500 5.6.1
Subject too long" or "500 5.6.1 Header too long".
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i don't think that the error message does really say what it means. with
subject lines that have 17000 chars, t-online gives exactly this error:
500 5.6.1 Header too long.
so i doubt that a body line is the reason for the error. i found out
now, that the newletter is sent to more than 1000 addresses. maybe
t-online really creates a header line with all recipients listed, and
this one for sure has more than 17000 chars, cause most email addresses
are longer than 17 characters.
i will investigate this and post more infos here.
...
jonas |
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Jonas Meurer *nix forums beginner
Joined: 20 Feb 2005
Posts: 47
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Posted: Fri Jul 21, 2006 11:11 am Post subject:
Re: Questions about "Line too long"
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On 20/07/2006 Matthew Byng-Maddick wrote:
| Quote: | On Thu, Jul 20, 2006 at 10:34:44AM +0200, Steffen Heil wrote:
[>Attribution lost:]
16000 chars, while for the t-online RCPT header it is
something like 3000 chars.
AFAIK, no line may be longer then 1000 chars in SMTP....
But headers may have whitespace folding...
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this means that they may be splitted by starting the second line with a
space char?
even if that is the case, i doubt that exim automatically breaks header
lines which are too long.
....
jonas
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