Problem sending mail in specific domain

[rispa]

Hi i have this problem.I just cant send mail in yahoo.co.uk. Here is the message :
The mail system

<xxxxxxx@yahoo.co.uk>: host mx1.mail.ukl.yahoo.com[195.50.106.7] said: 554
delivery error: dd This user doesn't have a yahoo.co.uk account
(xxxxxxx@yahoo.co.uk) [0] - mta153.mail.ukl.yahoo.com (in reply to end
of DATA command)
the account is defenetly correct and working. I can send in other domains.
please help.

[till]

I dont think ist a problem with yahoo in general, the error message just says that there is no such email address xxxxxxx@yahoo.co.uk at yahoo.

[rispa]

Yes i know, but i can send mail to this account from my gmail account

[till]

Ok, then make sure that:

1) You do not send from a dynamic IP address
2) Your IP is not blacklisted
3) That you have a correct reverse dns record for your IP
4) That the domain to send emails from in /etc/postfix/main.cf is correct and not e.g. server1.example.com

[rispa]

Sorry for the delay. I checked all the things you said and i still have the problem. I know that its very weird but any other ideas?
Thanks for your patience.


paris

[falko]

Please check if your server is blacklisted: http://mxtoolbox.com/blacklists.aspx

[rispa]

The results of this diagnostics:
RESULT : 193.92.63.25

Banner : fox.xlab.gr ESMTP Postfix (Ubuntu) [938 ms]

Connect Time : 0.25 seconds - Good

Transaction Time: 4.328 seconds - Good

Relay Check: OK - This server is not an open relay.

Rev DNS Check: OK - 193.92.63.25 resolves to fox.xlab.gr

GeoCode Info: Geocoding server is unavailable

Session Transcript:
HELO please-read-policy.mxtoolbox.com
250 fox.xlab.gr [234 ms]
MAIL FROM: <test@mxtoolbox.com>
250 2.1.0 Ok [312 ms]
RCPT TO: <test@mxtoolbox.com>
554 5.7.1 <test@mxtoolbox.com>: Relay access denied [234 ms]
QUIT
221 2.0.0 Bye [2359 ms]
9/12/2008 10:29:25 AM Central Standard Time

[falko]

Do you have an SPF and reverse record?

[rispa]

Sorry for my ignorance but what is SPF ? I'm not very experienced in this area.

[rispa]

i read in wikipedia for SPF and i don't have SPF.