[Bug 300098] New: Kmail downloads mail from POP server, but won't send messages through SMTP server

[Sean Mannell]

https://bugs.kde.org/show_bug.cgi?id=300098

            Bug ID: 300098
          Severity: major
           Version: unspecified
          Priority: NOR
          Assignee: kdepim-bugs at kde.org
           Summary: Kmail downloads mail from POP server, but won't send
                    messages through SMTP server
    Classification: Unclassified
                OS: Linux
          Reporter: smannell at kcnet.com
          Hardware: Ubuntu Packages
            Status: UNCONFIRMED
         Component: general
           Product: kmail2

I recently installed Kubuntu 12.04 and am having problems getting kmail (4.8.2)
working properly. I can download messages from the POP server; but only if I
DONT leave a copy of the messages on the server. When I try and send a message
I get the following SMTP error:

"5.7.1 Relaying Denied IP Name possibly forged [204.xx.xxx.xxx]"

I've tried different email accounts and different SMTP servers, but always get
the same error. Thunderbird works fine for two different accounts using either
SMTP server, under both Windows XP and Kubuntu 12.04.  I tried adding the IP
address in question to /etc/hosts but that didn't help either.

I'm almost certain the problem has to do with the way kmail/kde is sending my
network information to the smtp server, but everything else regarding network
traffic is working fine.

Out of curiousity, I connected an old computer running Kubuntu 8.04 and
received the same error. What's odd is kmail worked fine on this computer for
years at two different locations. At my previous house I was connected to the
internet through a DSL modem (no router) with a static IP address. At my
current location I had that machine temporarily connected to a DSL modem/router
using DHCP. This fall our ISP installed fiber to the house and replaced the
router, and now kmail won't work properly on either computer.



Reproducible: Always

Steps to Reproduce:
1.Set up an account in Kmail
2.Send a message
3.
Actual Results:  
The message didn't get sent but was instead put into the outbox folder, and the
following error message was received:
Failed to transport message. Message sending failed since the following
recipients were rejected by the server: myemail at kcnet.com (The server
responded: "5.7.1 <myemail at kcnet.com>... Relaying denied. IP name possibly
forged [204.XX.XXX.XXX]")

Expected Results:  
The mail should have gone through.

The SMTP server does not require authentication and doesn't support encryption,
so every other mail client I've used has no problem sending messages.

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