qmail with SMTP AUTH client patch

Hi all,

I run a qmail mailserver in my home network and use a DSL dialup account
to connect to the internet. All mail clients are configured to relay all
external mail through the qmail server.
Recently I noticed that some external mailserver dont like mails with a
FROM: MYADDRESS@gmx.de in the header sent from an DSL dialup account
with a different domain. They probably regard such kind of mail as SPAM.

Therefore I decided to apply the qmail-remote_authenticated_smtp.patch
from www.qmail.org to relay all outgoing mail through the mail server of
my email provider GMX. I applied the patch as described to
qmail-remote.c and changed the smtproutes so it now contains
:mail.gmx.net followed by login and password both base64 encoded.

After these changes sending external mail does no longer work. To check
whats going wrong I sniffed the SMTP connection both with and without
the patch:

--------------- with qmail-remote_authenticated_smtp.patch------------

220 {mp013} GMX Mailservices ESMTP
EHLO MYMAILHOST
250-{mp013} GMX Mailservices
250-8BITMIME
250-AUTH=LOGIN CRAM-MD5 PLAIN
250-AUTH CRAM-MD5 LOGIN PLAIN
250 STARTTLS
MAIL FROM:<MYADDRESS@gmx.de>
551 {mp013} Need to authenticate via SMTP-AUTH-Login
QUIT
221 {mp013} GMX Mailservices
-----------------------------------------------------------------------

---------- without qmail-remote_authenticated_smtp.patch------------

220 {mx015} GMX Mailservices ESMTP
HELO MYMAILHOST
250 {mx015} GMX Mailservices
MAIL FROM:<MYADDRESS@gmx.de>
250 {mx015} ok
RCPT TO:<MYADDRESS@gmx.de>
250 {mx015} ok
DATA
354 {mx015} Go ahead
-----------------------------------------------------------------------

As far as I understand, the patch dont authenticate as required by GMX.
Is there anybody out there who could give me a hint? Is there something
I have to do to make it work with GMX?

Thanks for your help,

Klaus

Solved!

GMX sends a

"AUTH=LOGIN CRAM-MD5 PLAIN"

but qmail-remote_authenticated_smtp.patch checks for "AUTH=LOGIN\n".

After changing

str_diffn(smtptext.s+i+4,"AUTH=LOGIN\n",11));

to

str_diffn(smtptext.s+i+4,"AUTH=LOGIN",10));

in qmail-remote.c it works fine.

Regards,

Klaus