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Old 10-19-2007, 03:12 PM   #1
christopher_c
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Registered: Sep 2007
Posts: 61

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Mail being returned from Hotmail.


When I try to send an email from SquirrelMail, all email that is sent to Hotmail gets returned instantly. Im using Sendmail and Dovecot.

The error is as follows:

Quote:
The original message was received at Fri, 19 Oct 2007 17:58:01 -0400
from localhost.localdomain [127.0.0.1]

----- The following addresses had permanent fatal errors -----
<me@hotmail.com>
(reason: 550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons.
Reasons for rejection may be re...l/network admins, please visit
http://postmaster.live.com for email delivery information and support)

----- Transcript of session follows -----
... while talking to mx3.hotmail.com.:
>>> MAIL From:<me@mydomain.org> SIZE=964
<<< 550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for
rejection may be related to content with spam-like characteristics or IP/domain
reputation problems. If you are not an email/network admin please contact your
E-mail/Internet Service Provider for help. Email/network admins, please visit
http://postmaster.live.com for email delivery information and support
554 5.0.0 Service unavailable
Keep in mind that I am able to send out to other email addresses like gmail.


I was researching to try and find a solution but only came up with something about my host files. This is what mine looks like, is there a problem?

Quote:
127.0.0.1 localhost.localdomain localhost
xxx.xx.xxx.xx mydomain.org
xxx.xx.xxx.xx = my server ip

Any thoughts on what this may be related to?
 
Old 10-19-2007, 04:32 PM   #2
tredegar
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Registered: May 2003
Location: London, UK
Distribution: Debian "Jessie"
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It looks like you have had your IP number blacklisted by "hotmail.com".
I know nothing about hotmail.com, but maybe you have been sending them spam. Even if you do not know it.
Are you dual-booting and using windows, even sometimes?
If so, your windows installation may have been compromised, and as you use the same IP address from linux, that has also been blocked.

It is possible, but unlikely, that your linux distro has been compromised (you as you have not provided any useful information about what you are running, and why, so it is difficult to help further).

I suggest you contact hotmail.com and ask them what the exact problem is. Then you can start a proper investigation, before all your other email accounts are shut down.
 
Old 10-19-2007, 05:02 PM   #3
christopher_c
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Registered: Sep 2007
Posts: 61

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Hi tredegar,

Im on a VPS which is running centOS. The hosting that I am with doesnt support email so I had to do this all myself.

The reason im thinking it has to do something with my SMTP server is that im also trying to connect my email address with Outlook express, in which everything is working fine although I just cant send out for some reason. Keep in mind when I use SquirrelMail web based client, I CAN send out. This is all so so strange ><

Also, the mail server has been up for about 2 weeks, possible to be compromised in that short time?
 
Old 10-24-2007, 04:01 PM   #4
jeperkins4
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Registered: Oct 2007
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I am running into this problem with both Hotmail and Yahoo. Is it possible that neither likes a header (or mail envelope) with a relay=localhost.localdomain?
 
Old 10-25-2007, 12:24 AM   #5
christopher_c
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Registered: Sep 2007
Posts: 61

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Quote:
Originally Posted by jeperkins4 View Post
I am running into this problem with both Hotmail and Yahoo. Is it possible that neither likes a header (or mail envelope) with a relay=localhost.localdomain?
Hey Jeper,

Im still stuck on this issue as well. Very unfortunate ><

I think i pinned it down to having something to do with SMTP AUTH.
 
  


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