[imp] Problem sending mail using SMTP (was) Session timeout when loggingon

Fri Feb 14 11:30:57 PST 2003

Further investigation found that the error was coming from the PEAR
module Mail::smtp, which was returning the generic error for
Net::smtp. Modification of Mail::smtp turn return the exact result of
Net::smtp error found this:

There was an error sending your message: Message size exceeds the
server limit

The response on my server on a EHLO command:

220 mailsrv.image-src.com ESMTP Sendmail 8.12.5/8.12.5; Fri, 14 Feb
2003 10:59:05 -0500
EHLO localhost
250-mailsrv.image-src.com Hello samadams.image-src.com
[65.219.192.35], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-DELIVERBY
250 HELP

>From RFC 1870:

   An SMTP client wishing to relay a large content may issue the EHLO
   command to start an SMTP session, to determine if the server
supports
   any of several service extensions.  If the server responds with
code
   250 to the EHLO command, and the response includes the EHLO keyword
   value SIZE, then the Message Size Declaration extension is
supported.

   If a numeric parameter follows the SIZE keyword value of the EHLO
   response, it indicates the size of the largest message that the
   server is willing to accept.  Any attempt by a client to transfer a
   message which is larger than this limit will be rejected with a
   permanent failure (552) reply code.

   A server that supports the Message Size Declaration extension will
   accept the extended version of the MAIL command described below.
   When supported by the server, a client may use the extended MAIL
   command (instead of the MAIL command as defined in [1]) to declare
an
   estimate of the size of a message it wishes to transfer.  The
server
   may then return an appropriate error code if it determines that an
   attempt to transfer a message of that size would fail.

>From Net::smtp

    function data($data)
    {
        if (isset($this->_esmtp['SIZE'])) {
            if (strlen($data) >= $this->_esmtp['SIZE']) {
                $this->disconnect();
                return new PEAR_Error('Message size excedes the server
limit');
            }
        }
...

And again from Net::smtp

function _negotiate()
...
        foreach ($this->_arguments as $argument) {
            $verb = strtok($argument, ' ');
            $arguments = substr($argument, strlen($verb) + 1,
                                strlen($argument) - strlen($verb) -
1);
            $this->_esmtp[$verb] = $arguments;
        }

Now, what seems to be happening here is that the _negotiate function
(which sends the ehlo command) is setting ehlo responses even though
they are empty, thus initializing the variable. Since the variable is
empty, the _esmtp['SIZE'] is 0 (my server doesn't have a maximum
message size). This is throwing the off the data function since it's
checking the size instead of letting the SMTP server decide if the
message exceeds the size limit. Instead of having the Net::smtp
function check the size, shouldn't we let the SMTP return a permanent
failure (552) reply code? Or, if the server doesn't give a value for
the SIZE parameter, shouldn't it not be set - in effect, unlimited?

I've commented out the message size check of the data function, and I
can now send mail.

Jeff Graves
Customer Support Engineer
Image Source, Inc.
10 Mill Street
Bellingham, MA 02019

jeff at image-src.com - Email
508.966.5200 X31 - Phone
508.966.5170 - Fax

-----Original Message-----
From: imp-bounces at lists.horde.org
[mailto:imp-bounces at lists.horde.org]On
Behalf Of Jeff Graves
Sent: Friday, February 14, 2003 10:26 AM
To: imp at lists.horde.org
Subject: [imp] Problem sending mail using SMTP (was) Session timeout
when loggingon

Well, I dumped the stable code and went for the latest CVS code (horde
3.0 and imp 4.0). I got it working using Mike's tutorial:

http://www.graftonhall.co.nz/mikes/Apache-Mysql-Php-Horde/Apache-PHP-H
orde-Win2K.html

Except that I am running on IIS and I have just 1 problem. I can't
send mail. It returns with a unable to send data message in the
compose window. I triple-checked my configuration and permissions on
php and horde temporary folders and enabled auditing to see if some
user was failing to gain access but didn't see anything. The horde log
gives this error:

Feb 13 20:03:13 HORDE [warning] [imp] unable to send data [on line 780
of "D:\Websites\test\horde\imp\compose.php"]

I opened up Network Monitor to what was being sent and it sends a EHLO
localhost. It then sends the MAIL FROM: command and server responds
250. Then it sends the RCPT TO: command and server responds 250. Then,
IMP sends QUIT and drops the connection. No errors of any kind from
the server. Not sure if anyone's seen this before, but before I
started troubleshooting, wanted to know if anyone knows what's going
on here.

Thanks,

Jeff Graves
Customer Support Engineer
Image Source, Inc.
10 Mill Street
Bellingham, MA 02019

jeff at image-src.com - Email
508.966.5200 X31 - Phone
508.966.5170 - Fax

-----Original Message-----
From: imp-bounces at lists.horde.org
[mailto:imp-bounces at lists.horde.org]On
Behalf Of Jeff Graves
Sent: Thursday, February 13, 2003 11:03 AM
To: IMP List
Subject: [imp] Session timeout when logging on

Well, lost a hard drive the other day on our mail server and after
building a new one and restoring mail for my users, I decided I needed
to make life harder for myself so I figured, what the hell, let's
install horde/imp on a windows box instead of putting it back on the
linux mail server. Anyway, here's the config

Win2k with IIS SP3
PHP4, MySQL, PEAR

I've tested them and they seem to be working properly. I installed
horde and configured horde.php with proper settings and set up a sql
prefs database and imap authentication. Without IMP, horde logs on
properly and I can change options no problem. If I install IMP, I then
get this message after submitting user and password:

CGI Error
The specified CGI application misbehaved by not returning a complete
set of HTTP headers. The headers it did return are:

FATAL:  emalloc():  Unable to allocate -1616738196 bytes

If I let IMP do the authentication (make change in registry.php and
horde.php) then the session timeouts after i click login. If I click
imp icon in the menu after login, IMP works normally. If i turn of the
sql prefs database in horde.php, the session proceeds to the imp
screen after login. The horde.log file shows authentication succeeded
in redirect.php. I'm not sure where to start looking. Is this possibly
a horde configuration problem (it looks to me like a mysql problem
since when I turn off the prefs database, imp responds immediately.
But then why does the prefs database work without IMP???), or is this
Win specific issue?

Thanks,

Jeff Graves
Customer Support Engineer
Image Source, Inc.
10 Mill Street
Bellingham, MA 02019

jeff at image-src.com - Email
508.966.5200 X31 - Phone
508.966.5170 - Fax

--
IMP mailing list
Frequently Asked Questions: http://horde.org/faq/
To unsubscribe, mail: imp-unsubscribe at lists.horde.org

--
IMP mailing list
Frequently Asked Questions: http://horde.org/faq/
To unsubscribe, mail: imp-unsubscribe at lists.horde.org